By John D. Sutter, CNN
Updated 2304 GMT (0704 HKT) October 27, 2016
(CNN)The Earth’s next mass extinction — the first caused by people — is on the horizon. And the consequences are almost unthinkably dire: Three-quarters of species could disappear.
This has happened only five times in the planet’s history — including the mass extinction that killed the dinosaurs.
What’s different now is that humans are causing these changes.
How? Well, we’re burning fossil fuels and consequently heating up the planet; turning massive chunks of land into farms; spreading invasive species and diseases around the world; boosting our own numbers and consuming more and more resources; and causing all sorts of trouble for the oceans, from overfishing to filling them up with plastic. (Did you know researchers expect the ocean to be equal parts fish and plastic, by weight, as soon as 2050?)
This subject certainly is alarming, especially when you consider the global picture.
Photo @ Jim Robertson