Charles on climate change: Think of your grandchildren as I think of mine

Sir David Attenborough has warned of the "disastrous" delays in taking action on climate change.

The naturalist and veteran broadcaster said the "alarming" thing is that other issues are going to "take priority and take world leaders' attention from this urgent problem".

Sir David, 89, was talking ahead of his latest documentary about the Great Barrier Reef and as the United Nations conference on climate change takes place in Paris.

The Prince of Wales is to address delegates to UN climate talks in Paris again today, speaking on the subject of forest protection.

Charles' speech comes as delegates focus on efforts to cut emissions from deforestation.

Experts warn agriculture, forestry and land use are responsible for almost a quarter of man-made greenhouse gas emissions, and action to tackle the problem is a key part of curbing climate change.

New action to protect tropical rainforests are expected to be announced as part of the climate talks.

Negotiators at the Paris climate talks are trying to meet a single global temperature target - to keep temperature rises over the course of this century to below two degrees Celsius. ITV News Science Correspondent Alok Jha reports:

It is one of the largest gathering of world leaders to ever come together in one place.

And many are saying this is the moment the world decided to save our planet.

ITV News International Affairs Editor Rageh Omaar reports:

Smog levels in China are now so bad that wearing masks has become a way of life.

Many residents say they struggle to breathe as cities are blanketed in a toxic haze.

ITV News China Correspondent Lucy Watson reports:

David Cameron has said the world must take action on climate change now before it is too late.

Addressing a summit in Paris, the Prime Minister said: "Instead of making excuses tomorrow to our children and grandchildren, we should be taking action against climate change today.

"What we are looking at is not difficult, it's doable, so therefore we should come together and do it."