Human Activity Produces Lots of Greenhouse Gases Flashcards
What do humans release into the atmosphere all the time?
Carbon dioxide
How do humans release carbon dioxide?
In car exhausts, industrial processes, as we burn fossil fuels
What are people doing to forests around the world? What does this affect?
Cutting them down for timber and to clear land for farming - affecting levels of CO2 in atmosphere
How is methane gas produced?
Naturally from various sources e.g rotting plants in marshland
Why kind of two ‘man-made’ sources of methane are on the increase?
Rice growing and cattle fearing
How is nitrous oxide released?
Naturally by bacteria in soils and the ocean
When is a lot more released from soils?
After fertiliser is used
What is nitrous oxides also released from?
Vehicle engines and industry
What are CFCs?
Chemicals that were once used in aerosol sprays and fridges
Why have most countries agreed not to produce CFCs anymore?
They are also damaging the ozone layer, preventing UV radiation from reaching the Earth
