The utterings of our leaders demonstrate how global warming has moved from a scientific theory where integrity matters, to a political movement where it doesn't, writes Robin Grieve.

Trade deal gives polluters power to sue governments who try to implement the Paris agreement.

In Europe the daffodils are in bloom and ski fields are bare in the warmest December ever. John Vidal asks how worrying is the world's strange weather.

The choices we make in the next five years will determine our climate future, writes Len Brown.

The Paris Agreement on climate change ticked one essential box from a narrow national point of view: it countenances the use of international trading in carbon credits to meet countries' emissions targets.

Severe climate change and global warming is already "baked in" even if carbon emissions ended tomorrow. Dangerous climate change is unpreventable, writes Winston Peters.

It's good news, but not a reason to be complacent; global emissions actually fell in 2015.

At present, the atmosphere resembles a wild, uncontrolled rubbish dump. Polluters are free to sink their carbons into the atmosphere simply because they can, writes Klaus Bosselmann.

Getting so many nations, including "developing" nations such as China, to sign on to emissions reductions certainly makes the agreement historic.

Nearly 200 countries strike deal on how to combat climate change, but it's what the energy companies do next that could make or break the agreement.

A global climate change deal has been hailed in New Zealand as a historic step, but scientists and environmentalists say the deal now needs to be backed with action.

The word "historic", already being used to describe the just-accepted Paris climate agreement, is more than warranted.

The Paris Agreement lays out an important vision. The world is now formally committed to action on climate change.

The New Zealand Government has hailed a historic deal on climate change, saying it is "the first truly global agreement on climate change".

The years-long quest for a universal pact to avert catastrophic climate change has neared the finish line with a draft agreement completed in Paris.

The world finally has a new accord on climate action, with the French presidency finally releasing the text in Paris.

Details of a landmark climate deal are set to be published in the next few hours and Kiwi businesses are hoping the agreement is ambitious.

Paris is a significant milestone, yes, but it is not the sum total of the world's response. Every day more people are making changes to reduce their impact on the climate, writes Rachael Le Mesurier.

The world is now on the brink of a landmark new climate deal, as the COP21 UN climate talks in Paris near a climax.

Tensions in Paris are rising as countries race to resolve differences and forge an agreement to avoid the worst consequences of climate change.

Science reporter Jamie Morton speaks with Canterbury University researcher Dr Daniel Price.

Not every aspect of climate science is completely resolved, and here are five questions that are guaranteed to get the experts going.

The Herald's science reporter, Jamie Morton speaks with science writer and RNZ producer Veronika Meduna.

Herald science reporter Jamie Morton explains the ABCs of the COP21 conference.

What happens when you bring together close to 200 nations for one of the most pivotal summits in history? Organised chaos.

Two international reports have slated New Zealand's climate change efforts as UN negotiations in Paris ramp up in their final week.

COMMENT: She doesn't have Tim Groser's intellectual subtlety and flair but Paula Bennett does have a strong opportunistic streak, writes Fran O'Sullivan.