The planet could pass the critical 1.5°C global temperature threshold in a decade—and is already two-thirds of the way to hit that warming limit, climate scientists warned on Thursday.

Speaking at a University of Oxford conference this week, led by leading U.K. climate researcher Richard Betts, scientists said global greenhouse gas emissions are not likely to slow down quickly enough to avoid passing the 1.5°C target.

The goal of limiting global warming to 1.5°C was agreed to in the landmark Paris agreement negotiated by 195 nations last year.

But the planet is continuing to experience unprecedented heat month after month, setting 2016 on track to be the hottest year ever recorded. In fact, the scientists said, Earth is currently on a trajectory to hit at least 2.7°C in global temperature rise.

Pete Smith, a plant and soil scientist at the University of Aberdeen in Scotland, said mass lifestyle change must be undertaken to combat rising temperatures, such as developing more sustainable diets, reducing food waste and red meat intake, and importing fewer greenhouse gas-heavy vegetables.