The Environmental Cost of Non-Renewable Energy

Coal, oil and natural gas transformed the modern world.

They powered factories, heated homes, fuelled transport and helped provide reliable electricity to billions of people.

But extracting and burning these fuels also has consequences that aren’t always visible on an electricity bill or at a petrol pump.

Air pollution, greenhouse gas emissions, mining, oil spills, water use and damage to landscapes are all part of the wider environmental cost of fossil-fuel energy.

Understanding those impacts helps explain why countries around the world are investing in cleaner alternatives.

What Is Non-Renewable Energy?

Non-renewable energy comes from resources that exist in limited quantities and aren’t replenished on a human timescale.

Coal, oil and natural gas are fossil fuels formed from ancient organic material over millions of years.

Once extracted and used, they cannot simply be replaced.

Uranium used in conventional nuclear power is also a finite resource and therefore usually classified as non-renewable.

However, nuclear power has very different environmental characteristics from fossil-fuel combustion.

For that reason, this article concentrates primarily on coal, oil and natural gas.

Burning Fossil Fuels Produces Greenhouse Gases

One of the largest environmental impacts of fossil fuels occurs when they are burned.

Coal, oil and natural gas contain carbon.

Combustion releases much of that carbon into the atmosphere as carbon dioxide.

Carbon dioxide is a greenhouse gas. Increasing its concentration in the atmosphere changes the Earth’s energy balance and contributes to global warming.

Different fossil fuels produce different amounts of carbon dioxide for the energy they provide.

Coal is generally particularly carbon-intensive, while natural gas produces less carbon dioxide than coal when burned for the same amount of energy.

But lower doesn’t mean zero.

All fossil fuels contribute greenhouse gases when used.

Methane Adds Another Problem

Carbon dioxide isn’t the only greenhouse gas associated with fossil energy.

Natural gas consists primarily of methane.

Methane can escape during oil and gas extraction, processing and transportation.

Coal mining can release methane as well.

Although methane behaves differently from carbon dioxide in the atmosphere, it is a powerful greenhouse gas.

Reducing methane leaks can therefore lower part of the climate impact associated with fossil-fuel production.

Modern monitoring technologies, including satellites and specialised sensors, are making it easier to identify some large methane leaks.

Finding them, however, is only useful if they are then repaired.

Fossil-Fuel Combustion Also Affects Air Quality

Burning fossil fuels can release pollutants in addition to carbon dioxide.

These can include sulfur dioxide, nitrogen oxides and fine particulate matter.

The exact emissions depend on the fuel, the equipment and the pollution-control systems being used.

Air pollution can contribute to smog and is associated with respiratory and cardiovascular health problems.

Modern pollution controls have greatly reduced some emissions from power stations and vehicles in many countries.

But air pollution remains a serious problem in numerous regions, particularly where fossil-fuel use is high and emission controls are weaker.

Replacing combustion with cleaner electricity can therefore have benefits beyond reducing greenhouse gas emissions.

It can also improve local air quality.

Coal Mining Changes Landscapes

Before coal can be burned, it has to be extracted.

Mining can significantly alter landscapes.

Surface mines may remove vegetation and large quantities of soil and rock to reach coal deposits underneath.

Underground mines disturb less land at the surface but can create other problems, including subsidence and contaminated mine water.

Waste material from mining also has to be stored and managed.

When a mine eventually closes, rehabilitation can continue for years.

Restoring vegetation and reshaping land can reduce some impacts, but a rehabilitated mining area isn’t necessarily identical to the ecosystem that existed before mining began.

Oil Extraction Carries the Risk of Spills

Oil has to travel a long way between the underground reservoir and the final customer.

It may pass through wells, pipelines, storage facilities, ships, refineries, trucks and distribution networks.

Every stage requires infrastructure.

Accidents can release oil into surrounding environments.

Large oil spills receive international attention because the damage can be dramatic, particularly in marine and coastal ecosystems.

Smaller spills and leaks can also occur throughout production and transport.

Modern engineering, monitoring and regulation can reduce these risks, but transporting enormous volumes of oil means the possibility of accidents can never be completely eliminated.

Water Can Be Affected Too

Energy production and water are closely connected.

Coal mining can affect groundwater and surface water.

Oil and gas extraction can produce contaminated wastewater that requires careful treatment or disposal.

Hydraulic fracturing uses water mixed with other materials to create fractures in underground rock formations, allowing oil or gas to flow more easily.

Thermal power stations — including many coal and gas plants — may also require significant amounts of water for cooling.

Water impacts vary enormously between locations and technologies.

In water-stressed regions, competition for water can make the issue particularly important.

Fossil Fuels Require Constant Extraction

There is a fundamental difference between fossil fuels and technologies such as solar and wind.

A solar panel requires materials and energy to manufacture and install.

A wind turbine requires steel, concrete, copper and other materials.

But once operating, neither requires a continuous stream of fuel to produce electricity.

A coal or gas power station does.

Fuel must continually be extracted, processed and transported for as long as the plant operates.

That creates an ongoing chain of environmental impacts associated with obtaining the fuel.

This doesn’t make renewable energy impact-free.

It does change where and when much of the environmental impact occurs.

Renewable Energy Has Environmental Costs Too

A fair comparison has to acknowledge this.

Solar panels require mining, manufacturing, transport and eventually recycling or disposal.

Wind turbines require large quantities of materials and can affect birds, bats and landscapes.

Hydroelectric dams can dramatically alter rivers and aquatic ecosystems.

Battery production requires minerals and energy.

Transmission lines occupy land and can affect habitats.

There is no way to supply billions of people with modern energy without some environmental footprint.

The relevant question isn’t whether an energy source has an impact.

They all do.

The more useful question is what those impacts are, how large they are across the technology’s entire life cycle and how effectively they can be reduced.

Land Use Is More Complicated Than It Looks

Renewable-energy projects are sometimes criticised for requiring large areas of land.

That concern can be legitimate.

Large solar farms occupy space, while wind farms extend across substantial areas.

But land-use comparisons need context.

Wind turbines themselves occupy only part of a wind farm site, allowing agriculture or grazing to continue between turbines in many locations.

Solar panels can be installed on roofs, car parks, industrial sites and reservoirs as well as undeveloped land.

Fossil-fuel systems also use land for mines, wells, pipelines, power stations, refineries, roads and fuel storage.

The environmental effect depends greatly on where infrastructure is built.

A renewable project placed in a sensitive ecosystem can still cause serious damage.

Good planning and careful site selection matter regardless of the technology.

What Happens After Energy Infrastructure Reaches the End of Its Life?

Every energy system eventually has to deal with old equipment and infrastructure.

Coal mines require closure and rehabilitation.

Oil and gas wells must be properly sealed.

Power stations need to be decommissioned.

Solar panels, wind turbines and batteries eventually need recycling, repurposing or disposal.

This is becoming increasingly important as the first large generations of modern renewable-energy equipment reach the end of their operating lives.

Designing products for easier recycling and recovering valuable materials can reduce the amount of new mining required in the future.

A cleaner energy system needs to think about the entire life of its equipment — not only what happens while electricity is being generated.

Why the Energy Transition Takes Time

If fossil fuels have significant environmental impacts, it might seem logical simply to stop using them.

The reality is more complicated.

Modern economies have built enormous systems around coal, oil and natural gas.

Power stations, vehicles, factories, heating systems, pipelines and international supply chains all depend on them.

Billions of people also rely on affordable and reliable energy every day.

Replacing this infrastructure takes investment, materials, skilled workers and time.

Electricity grids need to expand.

Renewable generation needs to be built.

Storage and flexible electricity systems are required.

Some industrial processes need entirely new technologies.

The challenge is therefore not simply deciding that cleaner energy is desirable.

It is building alternatives capable of providing the energy modern societies require.

The Goal Is Lower-Impact Energy

Energy has always shaped human development.

The challenge now is finding ways to maintain reliable, affordable energy while reducing the damage associated with producing it.

Fossil fuels delivered enormous economic and social benefits, but their environmental costs have become increasingly clear.

Renewable energy offers ways to generate electricity without continuously burning fuel, but those technologies also require thoughtful planning, responsible mining, recycling and careful management of land and ecosystems.

There is no perfectly clean source of energy.

But there are major differences in the types and scale of environmental impacts created by different technologies.

Understanding those differences is essential as the world decides what its future energy system should look like.

The Environmental Cost of Non-Renewable Energy

Coal, oil and natural gas transformed the modern world.

They powered factories, heated homes, fuelled transport and helped provide reliable electricity to billions of people.

But extracting and burning these fuels also has consequences that aren’t always visible on an electricity bill or at a petrol pump.

Air pollution, greenhouse gas emissions, mining, oil spills, water use and damage to landscapes are all part of the wider environmental cost of fossil-fuel energy.

Understanding those impacts helps explain why countries around the world are investing in cleaner alternatives.

What Is Non-Renewable Energy?

Non-renewable energy comes from resources that exist in limited quantities and aren’t replenished on a human timescale.

Coal, oil and natural gas are fossil fuels formed from ancient organic material over millions of years.

Once extracted and used, they cannot simply be replaced.

Uranium used in conventional nuclear power is also a finite resource and therefore usually classified as non-renewable.

However, nuclear power has very different environmental characteristics from fossil-fuel combustion.

For that reason, this article concentrates primarily on coal, oil and natural gas.

Burning Fossil Fuels Produces Greenhouse Gases

One of the largest environmental impacts of fossil fuels occurs when they are burned.

Coal, oil and natural gas contain carbon.

Combustion releases much of that carbon into the atmosphere as carbon dioxide.

Carbon dioxide is a greenhouse gas. Increasing its concentration in the atmosphere changes the Earth’s energy balance and contributes to global warming.

Different fossil fuels produce different amounts of carbon dioxide for the energy they provide.

Coal is generally particularly carbon-intensive, while natural gas produces less carbon dioxide than coal when burned for the same amount of energy.

But lower doesn’t mean zero.

All fossil fuels contribute greenhouse gases when used.

Methane Adds Another Problem

Carbon dioxide isn’t the only greenhouse gas associated with fossil energy.

Natural gas consists primarily of methane.

Methane can escape during oil and gas extraction, processing and transportation.

Coal mining can release methane as well.

Although methane behaves differently from carbon dioxide in the atmosphere, it is a powerful greenhouse gas.

Reducing methane leaks can therefore lower part of the climate impact associated with fossil-fuel production.

Modern monitoring technologies, including satellites and specialised sensors, are making it easier to identify some large methane leaks.

Finding them, however, is only useful if they are then repaired.

Fossil-Fuel Combustion Also Affects Air Quality

Burning fossil fuels can release pollutants in addition to carbon dioxide.

These can include sulfur dioxide, nitrogen oxides and fine particulate matter.

The exact emissions depend on the fuel, the equipment and the pollution-control systems being used.

Air pollution can contribute to smog and is associated with respiratory and cardiovascular health problems.

Modern pollution controls have greatly reduced some emissions from power stations and vehicles in many countries.

But air pollution remains a serious problem in numerous regions, particularly where fossil-fuel use is high and emission controls are weaker.

Replacing combustion with cleaner electricity can therefore have benefits beyond reducing greenhouse gas emissions.

It can also improve local air quality.

Coal Mining Changes Landscapes

Before coal can be burned, it has to be extracted.

Mining can significantly alter landscapes.

Surface mines may remove vegetation and large quantities of soil and rock to reach coal deposits underneath.

Underground mines disturb less land at the surface but can create other problems, including subsidence and contaminated mine water.

Waste material from mining also has to be stored and managed.

When a mine eventually closes, rehabilitation can continue for years.

Restoring vegetation and reshaping land can reduce some impacts, but a rehabilitated mining area isn’t necessarily identical to the ecosystem that existed before mining began.

Oil Extraction Carries the Risk of Spills

Oil has to travel a long way between the underground reservoir and the final customer.

It may pass through wells, pipelines, storage facilities, ships, refineries, trucks and distribution networks.

Every stage requires infrastructure.

Accidents can release oil into surrounding environments.

Large oil spills receive international attention because the damage can be dramatic, particularly in marine and coastal ecosystems.

Smaller spills and leaks can also occur throughout production and transport.

Modern engineering, monitoring and regulation can reduce these risks, but transporting enormous volumes of oil means the possibility of accidents can never be completely eliminated.

Water Can Be Affected Too

Energy production and water are closely connected.

Coal mining can affect groundwater and surface water.

Oil and gas extraction can produce contaminated wastewater that requires careful treatment or disposal.

Hydraulic fracturing uses water mixed with other materials to create fractures in underground rock formations, allowing oil or gas to flow more easily.

Thermal power stations — including many coal and gas plants — may also require significant amounts of water for cooling.

Water impacts vary enormously between locations and technologies.

In water-stressed regions, competition for water can make the issue particularly important.

Fossil Fuels Require Constant Extraction

There is a fundamental difference between fossil fuels and technologies such as solar and wind.

A solar panel requires materials and energy to manufacture and install.

A wind turbine requires steel, concrete, copper and other materials.

But once operating, neither requires a continuous stream of fuel to produce electricity.

A coal or gas power station does.

Fuel must continually be extracted, processed and transported for as long as the plant operates.

That creates an ongoing chain of environmental impacts associated with obtaining the fuel.

This doesn’t make renewable energy impact-free.

It does change where and when much of the environmental impact occurs.

Renewable Energy Has Environmental Costs Too

A fair comparison has to acknowledge this.

Solar panels require mining, manufacturing, transport and eventually recycling or disposal.

Wind turbines require large quantities of materials and can affect birds, bats and landscapes.

Hydroelectric dams can dramatically alter rivers and aquatic ecosystems.

Battery production requires minerals and energy.

Transmission lines occupy land and can affect habitats.

There is no way to supply billions of people with modern energy without some environmental footprint.

The relevant question isn’t whether an energy source has an impact.

They all do.

The more useful question is what those impacts are, how large they are across the technology’s entire life cycle and how effectively they can be reduced.

Land Use Is More Complicated Than It Looks

Renewable-energy projects are sometimes criticised for requiring large areas of land.

That concern can be legitimate.

Large solar farms occupy space, while wind farms extend across substantial areas.

But land-use comparisons need context.

Wind turbines themselves occupy only part of a wind farm site, allowing agriculture or grazing to continue between turbines in many locations.

Solar panels can be installed on roofs, car parks, industrial sites and reservoirs as well as undeveloped land.

Fossil-fuel systems also use land for mines, wells, pipelines, power stations, refineries, roads and fuel storage.

The environmental effect depends greatly on where infrastructure is built.

A renewable project placed in a sensitive ecosystem can still cause serious damage.

Good planning and careful site selection matter regardless of the technology.

What Happens After Energy Infrastructure Reaches the End of Its Life?

Every energy system eventually has to deal with old equipment and infrastructure.

Coal mines require closure and rehabilitation.

Oil and gas wells must be properly sealed.

Power stations need to be decommissioned.

Solar panels, wind turbines and batteries eventually need recycling, repurposing or disposal.

This is becoming increasingly important as the first large generations of modern renewable-energy equipment reach the end of their operating lives.

Designing products for easier recycling and recovering valuable materials can reduce the amount of new mining required in the future.

A cleaner energy system needs to think about the entire life of its equipment — not only what happens while electricity is being generated.

Why the Energy Transition Takes Time

If fossil fuels have significant environmental impacts, it might seem logical simply to stop using them.

The reality is more complicated.

Modern economies have built enormous systems around coal, oil and natural gas.

Power stations, vehicles, factories, heating systems, pipelines and international supply chains all depend on them.

Billions of people also rely on affordable and reliable energy every day.

Replacing this infrastructure takes investment, materials, skilled workers and time.

Electricity grids need to expand.

Renewable generation needs to be built.

Storage and flexible electricity systems are required.

Some industrial processes need entirely new technologies.

The challenge is therefore not simply deciding that cleaner energy is desirable.

It is building alternatives capable of providing the energy modern societies require.

The Goal Is Lower-Impact Energy

Energy has always shaped human development.

The challenge now is finding ways to maintain reliable, affordable energy while reducing the damage associated with producing it.

Fossil fuels delivered enormous economic and social benefits, but their environmental costs have become increasingly clear.

Renewable energy offers ways to generate electricity without continuously burning fuel, but those technologies also require thoughtful planning, responsible mining, recycling and careful management of land and ecosystems.

There is no perfectly clean source of energy.

But there are major differences in the types and scale of environmental impacts created by different technologies.

Understanding those differences is essential as the world decides what its future energy system should look like.