Earth is on track to face devastating consequences of climate change – extreme drought, food shortages and deadly flooding – unless there’s an “unprecedented” effort made to reduce greenhouse gas emissions by 2030, a new United Nations report warns. The planet’s surface has already warmed by 1 degree Celsius – or 1.8 degrees Fahrenheit – and could see a catastrophic 1.5 C — 2.7 F — increase between 2030 and 2052, scientists say. “This is concerning because we know there are so many more problems if we exceed 1.5 degrees C global warming, including more heat waves and hot summers,...