From climate change ‘certainty’ to rapid decline: a timeline of IPCC reports

Since 1992, the IPCC has highlighted rising greenhouse gases, marking their widespread and unprecedented' impacts by 2014

• IPCC report delivers final warning'
• Analysis: Humanity at the crossroads

We were warned. From the certainty" of rising greenhouse gas emissions in 1992 to widespread" and unprecedented" impacts on humanity by 2014, the UN's Intergovernmental Panel on Climate Change (IPCC) has been the beacon of climate science for the world.

There were earlier warnings. Even oil giants such as ExxonMobil made predictions in the 1970s and 1980s for global heating that proved breathtakingly" accurate - before embarking on decades of damaging denial.