Across the world, rainforests are becoming savanna or farmland, savanna is drying out and turning into desert, and icy tundra is thawing. Indeed, scientific studies have now recorded “regime shifts” like these in more than 20 different types of ecosystem where tipping points have been passed. Across the world, more than 20% of ecosystems are in danger of shifting or collapsing into something different.
These collapses might happen sooner than you’d think. Humans are already putting ecosystems under pressure in many different ways – what we refer to as stresses. And when you combine these stresses with an increase in climate-driven extreme weather, the date these tipping points are crossed could be brought forward by as much as 80%.
