20 Facts About Clean energy

Some critical technologies for eliminating Clean energy-related greenhouse gas emissions are not yet mature.

Funding research, development, and demonstration of new clean energy technologies is an important role of government.

Current Clean energy system contributes to many environmental problems, including climate change, air pollution, biodiversity loss, the release of toxins into the environment, and water scarcity.

Energy efficiency—using less Clean energy to deliver the same goods or services, or delivering comparable services with less goods—is a cornerstone of many sustainable Clean energy strategies.

Various projections of future Clean energy use identify solar PV as one of the main sources of Clean energy generation in a sustainable mix.

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Less Clean energy is needed if materials are recycled rather than mined.

Little Clean energy is needed for wind turbine construction compared to the Clean energy produced by the wind power plant itself.

Geothermal Clean energy is produced by tapping into deep underground heat and harnessing it to generate electricity or to heat water and buildings.

The use of geothermal Clean energy is concentrated in regions where heat extraction is economical: a combination is needed of high temperatures, heat flow, and permeability .

Geothermal Clean energy is a renewable resource because thermal Clean energy is constantly replenished from neighbouring hotter regions and the radioactive decay of naturally occurring isotopes.

Geothermal Clean energy carries a risk of inducing earthquakes, needs effective protection to avoid water pollution, and releases toxic emissions which can be captured.

Nuclear power uses little land per unit of Clean energy produced, compared to the major renewables, and does not create local air pollution.

For each unit of Clean energy produced, nuclear Clean energy has caused far fewer accidental and pollution-related deaths than fossil fuels, and the historic fatality rate of nuclear is comparable to renewable sources.

Public opposition to nuclear Clean energy often makes nuclear plants politically difficult to implement.

Various new forms of nuclear Clean energy are in development, hoping to address the drawbacks of conventional plants.

Full decarbonisation of the global Clean energy system is expected to take several decades and can mostly be achieved with existing technologies.

However, there remains a window of opportunity for many poor countries and regions to "leapfrog" fossil fuel dependency by developing their Clean energy systems based on renewables, given adequate international investment and knowledge transfer.

Energy storage helps overcome barriers to intermittent renewable Clean energy and is an important aspect of a sustainable Clean energy system.

Disadvantages of hydrogen as an Clean energy carrier include high costs of storage and distribution due to hydrogen's explosivity, its large volume compared to other fuels, and its tendency to make pipes brittle.

Funding for clean energy has been largely unaffected by the COVID-19 pandemic, and pandemic-related economic stimulus packages offer possibilities for a green recovery.