12:05

Claire, from Cambridgeshire, asks this:

What are the top five big things that urgently need to change to really make a difference; in policy, regulation, how money flows, in industry, agriculture...etc, and in what timescale?

1. Dethrone GDP as the measure of our well-being, and replace it with indicators whose optimisation does not require mass destruction.

2. Leave fossil fuels in the ground within 5 years, using a crash programme similar to the comprehensive retooling when the US entered the second world war, to replace them with low carbon alternatives.

‘There is no planet B’ Photograph: Ipon/SIPA/REX Shutterstock

3. Introduce a moratorium on new fossil-fuel dependent infrastructure.

4. Change farm subsidies to incentivise the retirement and rewilding of unproductive land, while encouraging a shift towards a plant-based diet.

5. Change the presumption permitting the exploitation of the seas: commercial fishing and other extractive activities should be permissible only under special licence, to be granted in exceptional circumstances.