Global leaders have expressed concerns about the findings of the latest report on global warming with UN chief Ban Ki-moon calling for urgent and rapid response to curb the menace.
The report "highlights the scientific consensus regarding the quickening and threatening pace of human-induced climate change," Ban Ki-moon said.
"The global response therefore needs to move much more rapidly as well, and with more determination," he said.
Stressing that protection of global environment was beyond the capacity of individual countries, the Secretary General called for international action to reverse the human-induced ecological damage to safeguard the common future.
"Environmental degradation reverses many of the gains made by mankind in recent decades, undercuts the fight against poverty and could even come to jeopardize international peace and security," he said.
"The common arena for such an action is the United Nations," he added in a message to the conference on environment in Paris.
US President George W Bush also welcomed the report but remained non-committal on taking any steps to stop green house emissions.
"The report will contribute to the body of knowledge that we have to study and understand the best way to meet the challenges of climate changes," deputy White House spokesman Tony Fratto said.
"We think it's a very valuable report. The conclusions are significant," he said, adding that "the US was an important participant in the development of this report".