1. Greenhouse Gases

2. What are Greenhouse Gases?
Gas in an atmosphere that
absorbs and emits radiation
within
THERMAL INFRARED range
--> known as heat radiation
in which light and EM waves
of any frequency will heat
surfaces that absorb them

3. How are they created?

9. Intensity of Sun's Radiation: measured by solar constant
Albedo: the percentage of radiation which is reflected straight back into space
Intensity of Sun's Radiation:
measured by solar constant
--> the amount of solar energy that falls every second on an area of 1m2 above the Earth's atmosphere that is perpendicular to the sun's rays

12. Possible Models for Global Warming
1. Changes in composition of greenhouse gases in the atmosphere
2. Increased Solar Flare activity
3. Cyclical changes in Earth's orbit of volcanic activity
Enhanced greenhouse effects is an enhancement of greenhouse effect due to the human activities on earth

14. Possible Solutions to reduce the enhanced greenhouse effect
Technological advances
greater efficiency in power production
decarbonising exhaust gases from power plants
fusion reactors made operational
Energy Requirements reduced
improved thermal insulation for homes
reducing journeys and using more energy efficient transport methods
use of combined heating and power systems (CHP)

15. Replacing the use of coal and oil
with renewable energy sources or nuclear power to reduce emissions
by using natural gases to slightly reduce emissions
Planting new trees & maintaining existing forest