MEXICO CITY – Delegates from 193 nations early Saturday adopted a modest climate deal to cope with global warming, pledging that both developed and poorer nations will curb emissions in an effort to limit average increases in the world’s temperature to 3.6 degrees Fahrenheit by the end of the century.

The United Nations accord, approved after two weeks of haggling in the resort of Cancun, stops short of a treaty but for the first time commits all countries to cut emissions that lead to extreme weather.

The United States and Europe had insisted on heightened scrutiny of major developing nations out of concern that countries such as China would hide information on whether they are making progress on reining in carbon emissions.

The agreement also sets up a Green Climate Fund to administer money from wealthy nations to help poor countries adapt to climate change. The fund begins with $30 billion in rapid assistance and pledges of $100 billion a year starting in 2020.

With the deal, negotiators put behind them the specter of the collapse of the U.N. climate process, haunted by a summit a year ago in Copenhagen that broke down in recriminations.

“Confidence has returned. Hope has returned,” President Felipe Calderon of Mexico said, adding that as the conference’s host he had overruled the lone objection of Bolivia, which said the accords were not strong enough to stop catastrophic climate change.

While non-binding, the accords place under U.N. oversight voluntary emissions cuts by more than 80 countries.