Electricity generated by geothermal energy does not produce significant carbon dioxide emissions. However, drilling and circulating deep well water does emit some carbon dioxide and methane.
Although it may make sense to get as much use out of timber scraps and garbage as possible, growing trees with the intent of using them strictly for densified biomass fuel
does not make sense over the short- or long-term.
Although the earth’s heat energy can’t be depleted by widespread geothermal energy production, individual geothermal reservoirs can lose heat energy over time, necessitating eventual re-drilling in a new formation, which adds to costs.
Any apples-to-apples comparison of solar energy to alternative sources of power must account for all environmental impacts, not just carbon dioxide emissions at the point of generation.
Like other renewable technologies, solar benefits from government subsidies and state mandates. Such subsidies reduce the costs directly attributable to solar power generation relative to traditional sources of electricity because taxpayers foot the bill.
Wind turbines do not produce any direct carbon dioxide emissions during operation, however, they do produce a variety of negative environmental impacts that merit attention.
The reality is that wind power is intermittent because the wind does not blow constantly. Therefore, wind turbine power generation constantly varies and cannot be depended on to provide a consistent, reliable flow of electricity on demand.
Liquified natural gas, commonly called LNG, is primarily methane (CH4) cooled to a liquified form for transportation and storage.