4.13: Understand How Human Activities contribute to Greenhouse Gases

GREENHOUSE GASES: Gases that Absorb Infrared Radiation from the Sun and Remains Trapped in the Earth’s Atmosphere, Causing Earth’s Average Temperature to Rise as a Result

MAN-MADE SOURCES OF GREENHOUSE GASES:

GREENHOUSE GAS	HUMAN ACTIVITIES
WATER VAPOUR	Naturally Exists in Rivers, Lakes and Oceans
CARBON DIOXIDE	Produced when Burning Fuels in Industrial Processes Produced in Car Exhausts
NITROUS OXIDE	Released from Fertilisers on Land in Farms Released from Cattle Waste in Farms Produced from High Temperatures in Vehicle Engines
METHANE	Released from Rice Paddy Fields Released from Cattle
CFC	Used in Fridges and is Released into the Atmosphere when Disposed Used in Aerosol Sprays