This year is likely to remembered as a turning point for climate change. It’s the year the impacts of rising carbon pollution became impossible to ignore. The world is overheating and vast swaths of the planet have suffered the consequences. At the same time, it’s also a year where world leaders crafted and agreed on a number of plans to try to turn the tide of carbon pollution and move toward a clean energy future. It’s clear 2016 was a year where planetary peril and human hope stood out in stark contrast. Here are the 10 most important climate milestones of the year.

The world struck an airline carbon pollution deal.

An extremely potent greenhouse gas is also on its way out.

July was the hottest month ever recorded. Then August tied it

Arctic sea ice got weird. Really weird

Divestment and clean energy investments each hit a record

The Great Barrier Reef was decimated by warm waters

The world breached the 1.5°C climate threshold

Carbon dioxide hit 400 ppm. Permanently

The Paris Agreement got real.

It was the hottest year on record. Again