An international coalition of environmental organisations, lawyers and academics has been formed to force governments and businesses to cut harmful gas emissions through legal action.
The Climate Justice Programme, which includes Greenpeace, WWF and Friends of the Earth, will use environmental laws to bring cases against the perpetrators of climate damage.
Three cases against the Bush administration in the United States have already started.
"The law has an increasing role to play in environmental issues but many have shied away from taking cases against climate change because it's considered to be too complicated and difficult to prove" said Peter Roderick, co-director of the programme.
Roderick, who was previously the in-house lawyer for Friends of the Earth, said that the programme intended to change the way in which environmental law was used to help stop climate change.