UN climate change talks in Barcelona have stalled as African countries say the world's rich nations must do more to cut emissions.
India and China's climate-change pact, signed Wednesday, will boost developing nations' bargaining power at the critical Copenhagen talks in December.
UN officials say it gave fresh momentum to upcoming talks for a new climate change treaty. But many unresolved issues remain.
China is due to unveil a new proposal at the gathering Tuesday, but its plans to cut "carbon intensity" rather than limit emissions may not satisfy US lawmakers.
At Tuesday's UN meeting, Presidents Obama and Hu set down markers for what they expect to achieve at the December climate change summit in Copenhagen.
Japan, Australia, and Britain offered plans and urged action Monday to overcome divisions – mainly between rich and developing nations – and forge a global pact to cut emissions.
Obama pledged to tackle global warming in his presidential campaign. Now the world waits to see if he takes a leadership role at a climate change meeting at the UN Tuesday.
The EU offered up to $15 billion to aid developing countries cutting emissions and urged rich nations to contribute more.