Earth
Ice on fire: The next fossil fuel
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Issue 2714
The doom-mongers may have got it wrong, there is enough land to produce the food needed to feed a growing population, reports say – and most of it is in Africa
A new source of carbon could curb greenhouse emissions, but only if it is used sensibly
Methane trapped in sub-marine ice and permafrost could possibly fuel the world for hundreds of years – but there's an explosive snag