Biophysical Causes of Climate Change

The natural greenhouse effect means that the earths temperature is ___ degrees WARMER than it would otherwise be?

• 13

• 17

• 24

• 33

Without the natural greenhouse effect the earths average termpertaure would be minus ___ degrees.

• 23

• 18

• 14

• 9

the earths average temperature is ____ ___ degrees.

• 23

• 18

• 14

• 9

A forest fire started by lightning is ________ green house effect

• enhanced

• natural

Trees are primarily composed of carbon so when a natural forest fire starts they release

• methane

• suplhur dioxide

• CO2

• nitrous oxides

Ruminants ie cows release

• CO2

• methane

• nitrous oxide

• suplhur dioxide

grass fires and bush fires can also release some

• methane

• CO2

• nitrous oxide

• CFCs

If lightning hits a coal seam what ghg is released?

• methane

• CO2

• nitrous oxide

• CFCs