Human Activity Produces Lots of Greenhouse Gases

Question 1

What do humans release into the atmosphere all the time?

Answer 1

Carbon dioxide

Question 2

How do humans release carbon dioxide?

Answer 2

In car exhausts, industrial processes, as we burn fossil fuels

Question 3

What are people doing to forests around the world? What does this affect?

Answer 3

Cutting them down for timber and to clear land for farming - affecting levels of CO2 in atmosphere

Question 4

How is methane gas produced?

Answer 4

Naturally from various sources e.g rotting plants in marshland

Question 5

Why kind of two ‘man-made’ sources of methane are on the increase?

Answer 5

Rice growing and cattle fearing

Question 6

How is nitrous oxide released?

Answer 6

Naturally by bacteria in soils and the ocean

Question 7

When is a lot more released from soils?

Answer 7

After fertiliser is used

Question 8

What is nitrous oxides also released from?

Answer 8

Vehicle engines and industry

Question 9

What are CFCs?

Answer 9

Chemicals that were once used in aerosol sprays and fridges

Question 10

Why have most countries agreed not to produce CFCs anymore?

Answer 10

They are also damaging the ozone layer, preventing UV radiation from reaching the Earth