How to go about convince a population skeptical of global warming?

Global warming (Anthropogenic hazard)

Explanation:

Global warming is said to be a long term rise in the annual temperature of the earth. There a number of scientists that  have have give statements that the global warming as summarized by IPCC which is endorsed by other scientific bodies, including many climatologists, anthro geographers and other oceanographic experts which have recorded temperature changes over the period of decades and have seen the reaction with various elements like the greenhouse gases on the environment which will risen from 1.5 to 5.8 degrees since 1950 to 2100 and rise in annual surface temperature to 3 degrees. Nearly 98% of evidence proves the existence of human impact upon the earth's environment and now the world is moving towards a global cooldown.