The stuff we've put on Earth weighs 30 trillion tonnes
15 Dec 2016
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Scientists have recorded a tally of 50 kilos of human artefact for every square metre of the Earth’s surface | Yinan Chen |
The bleak conclusion is that cities, factories, cars, railways, cameras, computers, ballpoint pens, swords, machine guns and all other manmade things now weigh about 30 trillion tonnes.
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