There are two numbers you need to know about climate change. The first is 51 billion. The other is zero. Fifty-one billion is how many tons of greenhouse gases the world typically adds to the atmosphere every year.

Sorry, but I cannot take your philanthropy on climate change seriously when you have a massive short position against Tesla, the company doing the most to solve climate change.

Anyone who believes that there is no such thing as global warming must be blind or unintelligent.

It is a source of great pride to me that the leading role my husband played in encouraging people to protect our fragile planet, lives on through the work of our eldest son Charles and his eldest son William. I could not be more proud of them.

The time for words has now moved to the time for action [on climate change].

Reverence for nature is part of our shared heritage. Combating climate change is in our enlightened self-interest.