The United Nations' Intergovernmental Panel on Climate Change (IPCC) has called for drastic and deep GHG emissions cuts to keep the average global temperature less than 1.5C above pre-industrial levels.

“There is a rapidly closing window of opportunity to secure a liveable and sustainable future for all,” the report’s authors write. 

The report has been compiled by 93 authors from research done over the last six years by hundreds of the world's top climate scientists. It shows that human activities have already warmed the Earth by 1.1ºC, resulting in more frequent extreme weather and increased food and water scarcity for millions of people.

If no change occurs, current policies set to warm the Earth by a further 2ºC above pre-industrial temperatures by 2100, making the planet's climate "dangerously unstable". 

However, the report's authors stress that it is not yet too late to take action. They argue that the technology needed...