Large majorities in many countries now believe human activity is causing global warming, a BBC World Service poll suggests.
More than 22,000 people were surveyed in 21 countries and the results show a great deal of agreement on the issue.
An average of 79% of respondents to the BBC survey agreed that "human activity, including industry and transportation, is a significant cause of climate change".
If we do not act now, the impact of climate change will be devastating
Ban Ki-moon
UN Secretary General
VIEWS ON CLIMATE CHANGE
Major action needed: 65%
Modest action later: 25%
No action needed: 6%
Source: BBC World Service poll
However, US President George W Bush was not present. Instead, he is hosting a meeting of 16 "major emitter" countries in Washington on Thursday and Friday.