think positive - think climate change, page-16

(i)Higher CO2 levels lead to greater photosynthesis in plants.

(ii) An overall warming of the planet (however caused) will increase soil temperatures, which helps with germination, results in stronger plant yields, and opens up more land for agriculture.

(iii) Higher temps increase the amount of evaporation and hence amount of rainfall.

For genuine environmentalists, a warming planet on balance is a Godsend.