We, the undersigned, support the call for the UK and other OECD governments to negotiate a fossil fuel non-proliferation treaty to complement the Paris agreement on climate change, as proposed in your article “We need a fossil fuel non-proliferation treaty – and we need it now” (theguardian.com, 23 October).

The latest report from the IPCC shows we cannot afford to burn the vast majority of remaining reserves of fossil fuels if we are to keep warming below 1.5 or even 2 degrees. A new line in the sand is needed. We support an agreement with a moratorium on any further expansion of the fossil fuel industry in rich countries, together with a fund to support renewable energy development in poorer countries to reduce the need for fossil fuels, paid for by redirecting the staggering $10m per minute that governments currently spend on fossil fuel subsidies. The best way to mark the 50th anniversary of the nuclear non-proliferation treaty would be to begin negotiation of its fossil fuel equivalent.

Bill McKibben Founder, 350.org

Naomi Klein Writer and activist

Caroline Lucas MP Green party

John Sauven Executive director, Greenpeace

Craig Bennett CEO, Friends of the Earth

Ann Pettifor Prime Economics

Leo Murray 10:10

• The letter (27 October) from eminent academics and others is right in asking for “a credible plan for rapid total decarbonisation of the economy”. It is also right to demand that the government “tell the hard truth to its citizens”. This hard truth should not only apply to the effects of climate change but to the necessary measures to mitigate it. An example measure would involve a great deal of rationing akin to that in wartime. For instance; petrol and diesel cars could be restricted to use only every other day, natural gas for central heating could be rationed to that required to heat an average house to 20 degrees, or even less. Even electric cars could be affected, it may be impossible to recharge batteries when there is a windless night. The green lobby spells out the hard truth on the effects of climate change but fails to spell out the harsh measures necessary to mitigate it.

John Huggins

(Independent consultant; formerly director of gas transportation for British Gas), London

• Count me in for the extinction rebellion. I fully support the aim of “rapid total decarbonisation”, and the need for credible plans. They will succeed when there are millions of accompanying individual decarbonisation plans being implemented by each and every one of us. And we can start now. I look forward to seeing significantly less traffic on our roads, reduced flights from our airports, reduced heating and lighting in all our buildings, reduced building and construction, and reduced needless stuff being sold in our supermarkets and shopping malls.

John Ranken

Girton, Cambridgeshire

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