The United in Science report, which is backed by the UNEP and the IPCC, estimates global emissions are not likely to peak before 2030 on our current trajectory. It says policies to reduce emissions must triple to meet the 2C target and increase fivefold to keep heating to within 1.5C.
A separate report found emissions from coal power would need to peak next year and fall to zero by 2040 if the world is to meet the Paris goals. For industrialized countries that have the capacity to move more rapidly to cleaner sources such as the US, Australia and those in western Europe, it would mean ending coal use for electricity by 2031.
Lower economic countries would need to shut their coal plants across the following decade.
