Humanity has raced past four of the boundaries keeping it hospitable to life, and we’re inching close to the remaining five, an Earth resilience strategist has found.
In a paper published in Science in January 2015, Johan Rockström argues that we’ve already screwed up with regards to climate change, extinction of species, addition of phosphorus and nitrogen to the world’s ecosystems and deforestation.
We are well within the boundaries for ocean acidification and freshwater use meanwhile, but cutting it fine with regards to emission of poisonous aerosols and stratospheric ozone depletion.
“The planet has been our best friend by buffering our actions and showing its resilience,” Rockström said. “But for the first time ever, we might shift the planet from friend to foe.”