If you want to eliminate CO2 why not eliminate 7 out of 8 people?

Are we sure that CO2 is the problem? This video shows William Happer rebutting the "United Nations' climate delusion". The UN body - the IPCC - blames climate change on humans. Part of the motivation of the UN is a movement that Happer alludes to where a movement is to eliminate almost 90 percent of the population.