4.14: Understand How Human Activities contribute to Greenhouse Gases

GREENHOUSE GASES: Gases responsible for global warming - Carbon Dioxide, Methane, Nitrous Oxide, and CFC's (Chlorofluorocarbons)

SOURCES OF GREENHOUSE GASES:

GREENHOUSE GAS	HUMAN ACTIVITIES
WATER VAPOUR	Naturally exists in rivers, lakes and oceans
CARBON DIOXIDE	Produced during combustion of fuels in industrial processes Produced in car exhausts
NITROUS OXIDE	Released from fertilisers in farms Released from Cattle waste in farms Produced from combustion of fossil fuels under high temperature in vehicle engines
METHANE	Released from rice paddy fields Released from Cattle
CFC	Used in fridges and released into the atmosphere when disposed Used in aerosol sprays