A $3.3 trillion industry must change drastically if we want to save Earth — and it's not fossil fuels

By Sarah Kramer, Tech Insider.

If the world is going to fight climate change, it's not just fossil fuels we need to worry about.

According to a new study, we'll have to get very clever about our food supply.

In a study published Tuesday in the journal Global Change Biology, scientists suggest that greenhouse gases emitted by global agriculture will have to be cut — and drastically, perhaps five times as much as current reductions call for.

This marks the first calculation of precisely how much the agricultural sector will need to reduce its output of potent heat-trapping gases like methane (which is far worse than carbon dioxide) in order to satisfy the Paris Agreement on climate change.