Big money to respond to climate change is key to the United Nations talks underway in Azerbaijan. Vulnerable nations say they need as much as $1.3 trillion to cope with damage they've already suffered from extreme weather events,

Big money to respond to climate change is key to the United Nations talks underway in Azerbaijan BAKU, Azerbaijan — Just as a simple lever can move heavy objects, rich nations are hoping another kind of leverage — the financial sort — can help them come up with the money that poorer nations need to cope with climate change.

Negotiators are fighting over three big parts of the money issue: How big the numbers are, how much is grants or loans, and who pays.