Leave most fossil fuels in the ground, or fry

For the world to meet its climate goals, a third of the world’s oil, half its gas and 80% of its coal must stay underground.

The sheer scale of the fossil fuel reserves that will need to be left unexploited for decades if world leaders sign up to a radical climate agreement is revealed in a study by a team of British scientists.

It shows that almost all the huge coal reserves in China, Russia and the US should remain unused, along with over 260 billion barrels of oil reserves in the Middle East – the equivalent of Saudi Arabia’s entire oil reserves. The Middle East would also need to leave over 60% of its gas reserves in the ground.

The authors of the report, which is published in the journal Nature, say some reserves could be used after 2050, so long as this kept emissions within the CO2 budget, which would be only about half the amount the world can afford to use between now and 2050.

They say a factor that might help in the use of fossil fuels is that carbon capture and storage (CCS) is expected to be much more widely deployable by mid-century, assuming it to be a mature technology by then.

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