wealthy nations

It may be no surprise, in light of the global economic recession, that the world's richest nations have failed to deliver much of the aid they promised Africa four years ago.

But campaigners are not letting the Group of Eight (G-8) industrialized countries off the hook.

Wealthy nations, as history's biggest polluters, should cut greenhouse gas emissions by 40 percent from 1990 levels by 2020, China says in a policy document on climate change.

The government also rolled out fresh help for solar power and other "green energy."