| http://www.w3.org/ns/prov#value | - ion tonnes of methane per year, the scientists were able to calculate that the sauropods produced a vast 520 million tonnes annually.Today, total methane emissions across the world tally to nearly 500 million tonnes, mostly from animals and human activities such as the production of dairy and meat.The 20 million tonne difference between the two figures could have been enough to raise the Earth's t
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