A leaked Danish document at the U.N. Climate Change Summit being held this week in Copenhagen, Denmark, revealed that poor nations will demand that wealthy countries pay more of the costs of fighting global warming.
The price tag could be huge. Analysts expect it to run over $10 trillion in the next 20 years.
The costs are estimated to be high, because the efforts to bring down the global temperature even slightly would mean huge changes in lifestyles, economic development, and even agriculture.
Developing countries have reacted angrily to the leaked document, which alleges developed countries have worked behind closed doors to draft a document to work in their favor.
The Danish draft proposal would allow rich countries to cut fewer emissions while poorer nations would bear the tougher limits on greenhouse gases and more conditions on money available to adapt.