The world's poorest nations say the Paris climate agreement is their "lifeline" and must be strengthened.
The Climate Vulnerable Forum, (CVF) representing 48 countries, said the deal was crucial to their survival.
In a swipe at President Trump's oft-used phrase, they said that "no country would be great again" without swift action.
Thousands of delegates are meeting here in Bonn to develop the rule book for the Paris deal.
Around one billion people live in countries that are part of the CVF.
Source : http://www.bbc.com/news/science-environment-39954423