Sentences with phrase «produce significant amounts of carbon dioxide»

Hydroelectric dams produce significant amounts of carbon dioxide and methane, and in some cases produce more of these greenhouse gases than power plants running on fossil fuels.

Not exact matches

The carbon deposits show that something caused a significant uptick in the amount of carbon - containing gases — carbon dioxide or methane — produced at the time of the mass extinction.

Cities are major contributors to climate change: although they cover less than 2 per cent of the earth's surface, cities consume 78 per cent of the world's energy and produce more than 60 % of all carbon dioxide and significant amounts of other greenhouse gas emissions, mainly through energy generation, vehicles, industry, and biomass use.

Motor vehicles give off only minimal amounts of sulfates and nitrates, both pollutants that cool climate, though they produce significant amounts of pollutants that warm climate such as carbon dioxide, black carbon, and ozone.

One problem is that producing oil from shale or oil sands generates significant amounts of carbon dioxide — but a lot of that carbon dioxide comes from producing the hydrogen needed to process the raw materials.