A Solomon Islands negotiator at the climate change conference in Mexico says there must be a renewed commitment to reducing greenhouse gas emissions in Cancun.
Developing countries want to extend the Kyoto Protocol on reducing emissions beyond 2012, but some industrialised nations, including Japan, Russia and Canada, want a separate new agreement that regulates the emissions of all nations.
China has just stated it is prepared to make its voluntary carbon emissions target part of a binding United Nations resolution.
But the Solomon Islands UN Ambassador, Colin Beck, says the stance of countries such as Japan is worrying given the latest research from the United Nations environment programme.
"We would need to have a second commitment period and there be no gaps between the first and the second commiment period in terms of reduction of greenhouse gases. Recent reports by UNEP indicated that the climate is at a much more worse situation in which peaking must happen by 2015 so the window to make changes is fast closing."
Colin Beck says there is a sense of urgency from all delegates at the conference.