A global solution is needed to tackle climate change and the inclusion of the United States in any agreement is vital, European Commission President José Manuel Barroso president, told CNBC Europe.
If the united states is not involved “there will always be an argument for others (such as China and India) not to engage in a truly multi-lateral process, that's why the targets have to be established globally and be enforceable," Barroso told “Squawk Box Europe.”
With the validity of the G8's emissions policy hanging in the balance, Barroso said that a lack of international agreement could seriously hamper the credibility of its ability to fight climate change.
Having warned on the dangers of the U.S. not signing up to bilateral emissions targets, Barroso conceded that the Americans had made clear progress recently.
"We welcome that … but now it is important to understand that this should be a contribution to a global agreement that can bind us all after the Kyoto regime (which ends in 2012)," the commission president said.