COP21

Obama called on leaders to secure an agreement paving the way for regularly updated targets.

Authorities in Chinese capital issued rare "orange" alert over dangerously high levels of smog.

"I can only urge you to think of your grandchildren, as I think of mine."

Companies pledge their dedication to the fight against climate change ahead of the Paris summit.

UN Secretary-General's speech at the start of the COP21 Paris negotiations

Laeders of Afghanistan and Pakistan are poised to meet in Paris on the sidelines of the UN climate change conference

French President welcomes heads of states from 147 countries to Le Bourget conference centre.

At least 50,000 people marched through London in what was the UK's largest ever climate change demonstration.

World leaders attend the opening day of the Paris climate change negotiations.

COP21 is expected to be a historic meet in over 20 years of UN negotiations.

The US, UK, China and India to double budget for clean energy development over next five years.

Obama pays his respects shortly after landing in Paris for the Climate Change Summit.

Sunday's protest is the largest climate march ever to take place in the UK

Leaders of Labour and Green parties address thousands on the streets of London ahead of the Paris climate talks.

89-year-old broadcaster says that if we can land people on the moon, we can solve climate change.

People of Paris find unique ways to voice their concerns about climate change, after marches were banned.

More than 2,000 marches and other events are taking place across the globe.

Greenpeace is trying to raise awareness of climate change ahead of COP21 summit in Paris.

Authorities places 24 activists under house arrest before of global warming summit in French capital.

Everything you need to know about the COP21 climate change summit in Paris.

Three million Avaaz climate change petitioners want world leaders to end use of fossil fuels.