Here's some more quotes:
"10 kilos of topsoil, 800 litres of water, 1.3 litres of diesel, 0.3g of pesticide and 3.5 kilos of carbon dioxide – that's what it takes to deliver one meal, for just one person," Cribb says.
"When you multiply it by 7 to 10 billion people each eating around a thousand meals a year, you can see why food is fast becoming the challenge of our age."
"The human jawbone is now by far the most destructive implement on the planet. It's wrecking soil and water, clearing forests, emptying oceans of fish and destroying wildlife as never before – but few people realise it because of long industrial food-chains that hide the damage from them," he says.
In "Surviving the 21st Century" Cribb presents the scientific evidence for the ten greatest threats facing humanity – and what we can do about them. The book is published by world-leading science publisher Springer International.
Humanity needs to double food production by the 2060s – but the basic resources to do it are become scarce, heightening the risk of famines, wars and mass migration.
"The world currently loses 75 billion tonnes of soil a year – and the problem is getting worse. Scientists recently estimated we've lost a third of the world's soil in the last 40 years.
Read more at: http://phys.org/news/2016-12-meal-eaten-planet-kilos-lost.html#jCp