AS world leaders descended on Copenhagen to reach a deal on climate change, one Enfield environmentalist went along to call for a fair, ambitious and legally binding deal.

It took a 19 hour bus ride for James Buchanan, a 24 year old campaigner for the Catholic Agency for Overseas Development (CAFOD) to reach the Danish city last weekend.

Mr Buchanan, from Burleigh Road, joined 100,000 green activists at a demonstration demanding climate justice last Saturday.

During the three day trip he also met representatives of development organisations and saw Archbishop Desmond Tutu present UN climate chief Yvo de Boer with a petition signed by hundreds of thousands.

The UN summit, which campaigners hope will result in a treaty on carbon emissions to tackle global warming, closes Friday after eleven days.

The Prime Minister and President Obama are among the dignitaries there for the final stage, but as yet no replacement to the Kyoto Protocol, expiring in 2012, has emerged.

Mr Buchanan, who works in CAFOD's London office, said he wanted to send a signal to leaders to take global action.

"People I work with around the world say it's having a serious impact on their communities," he said. "One person from Bangladesh said floods had made the water there salty so crops can't grow.

"I hope for a deal that is fair to the developing countries who have done the least to cause climate change but are the most affected".

The activist, who doesn't own a car and tries to recycle as much as possible said there are many things people can do to make the world greener.

"I think it's really important people do take as much action as they can," he said.

He dismissed reports of clashes between police and protestors. "We didn't see any violence," he said. "It was completely peaceful and a great atmosphere".

Mr Buchanan welcomed the international event and said it was crucial all nations had their say.

"Sometimes big decisions only get made with people sitting around a table".

But he said campaigners must keep the pressure on whatever the outcome.

"There will still be some work to do".