2. When did concentrations of these greenhouse
gases start rapidly increasing? What might have caused
Each of these greenhouse gases affects climate differently.
Some gases can trap the suns energy better than
others. The degree to which a gas traps solar energy
is called its radiative forcing value. Radiative forcing
values are indicated on the right axis of the graphs.
The higher the radiative forcing value, the stronger
its effect on global warming.
3. Which gas affects global climate most?
Which has the least effect?