ECOLOGY AND ENVIRONMENT - greenhouse gases

Question 1

What is a greenhouse gas?

Answer 1

atmospheric ggas that absorbs infrared light

Question 2

Why are greenhouse gases important?

Answer 2

to ensure earth is warm for life

Question 3

What can increased levels of greenhouse gases lead to?

Answer 3

INCREASE IN EARTH TEMPERATURES = GLOBAL WARMING

Question 4

Name key greenhouse gases

Answer 4

carbon dioxide (CO2)
methane (CH4)
water vapour (H2O)
nitrous oxide (N2O)

Question 5

How do human activities contribute to water vapour?

Answer 5

evaporation from rivers, lakes + oceans

Question 6

How do human activities contribute to CARBON DIOXIDE?

Answer 6

Burn of fossil fuels + deforestation

less trees = less CO2 removed from atmosphere for photosynthesis

Question 7

How do human activities contribute to NITROUS OXIDE?

Answer 7

released from fertiliser production and use + combustion of fossil fuels (cars)
released in treatment of domestic water

Question 8

How do human activities contribute to METHANE?

Answer 8

released from rice fields + cattle farming

Question 9

How do human activities contribute to CFC´s

Answer 9

used in fridges + aerosol sprays