Climate change is a global issue - from the point of view of the Earth's climate a molecule of CO2 emitted in Bejing is the same as a molecule emitted in Sydney.

If you are interested enough in the climate crisis to read this post, you probably know that 2 degrees Centigrade of warming (or 3.6 degrees Fahrenheit) is the widely acknowledged threshold for "dangerous" climate change.

Geoengineering - the deliberate large-scale manipulation of the earth's climate to offset global warming - is a nightmare fix for climate change.

Among all the tests President Obama faced in his first term his biggest failure was climate change.

Bill Gates is a relative newcomer to the fight against global warming but he's already shifting the debate over climate change.

Some people call it global warming some people call it climate change. What is the difference?

Doing all we can to combat climate change comes with numerous benefits from reducing pollution and associated health care costs to strengthening and diversifying the economy by shifting to renewable energy among other measures.

The damage that climate change is causing and that will get worse if we fail to act goes beyond the hundreds of thousands of lives homes and businesses lost ecosystems destroyed species driven to extinction infrastructure smashed and people inconvenienced.

Some argue that now isn't the time to push the green agenda - that all efforts should be on preventing a serious recession. That is a false choice. It fails to recognise that climate change and our carbon reliance is part of problem - high fuel prices and food shortages due to poor crop yields compound today's financial difficulties.

As far as I'm aware everybody in the shadow cabinet accepts that there's a compelling case on climate change and a strong scientific case.