The world is heading for an "irrecoverable overshoot" on dangerous warming unless governments reject fossil fuels and start rapidly cutting emissions, a report has warned. The world is likely to cross the 1.5°C global warming threshold within the next few years, according to a new United Nations Environment Programme (UNEP) report. UNEP says Earth is likely to cross the 1.5°C warming threshold soon. (Image: AI representative) World likely to cross 1.