Everything about my politics has been about the future.

If you decide to run for the leadership, you have to go through it with the people you love. But you also have to protect them and I am determined to protect my mum.

The science is getting worse faster than the politics is getting better.

What's now urgently needed [to stop environmental disaster] is the international political commitment to take action to avoid dangerous climate change.

Essentially, by 2050 we need all activities outside agriculture to be near zero carbon emitting if we are to stop carbon dioxide levels in the atmosphere growing

We are living as if we had three planets' worth of resources to live with rather than just one. We need to cut by about two-thirds our ecological footprint. For that we need one planet farming as well as one planet living - one planet farming which minimises the impact on the environment of food production and consumption, and which maximises its contribution to renewal of the natural environment

We know from history that the way wars are concluded is absolutely the key to whether or not there is any peace to be kept.