In 2010, these 76 countries were collectively responsible for 85% of annual global emissions.

The total global emissions add up to the same amount from both approaches.

This would help cut overall global emissions while sending Western money and technology to other countries.

You only need ten or so of those a year and you're going a long way to stabilising global emissions.

So the global emissions trading system can be born from the bottom up.

Last but not least, we must also start work now to halve global emissions by 2050.

There is, however, no time to lose: global emissions have to be reduced within the next 10 years.

If we are to achieve this, global emissions must be reduced by at least 30% over the next 10 years.

National science academies have called on world leaders for policies to cut global emissions.

Meeting the basic energy needs of all the world's people would contribute less than 2% to current global emissions.