Global ecological tipping point

Past these tipping points, scientists recon there is no way back.

• The Arctic: we have lost the frozen Arctic.
• West Antarctic sea ice: we could lose this within ten years, and if so, sea levels will eventually rise three metres because of it.
• Amazon Rainforest: the current projection is that we have five to ten years before the rainforest tips into a new state, that of a savannah.
• Greenland ice sheet: we could lose this in 20 to 25 years, and if so, sea levels will eventually rise seven metres because of it.