Not that im defending anything he does, but gates believes that its possible to avert a climate disaster while not requiring everyone to give up everything in return for it. ie it doesnt matter if he has a 66k sq foot house, if its powered by renewable resources, doesnt use excessive water or other pollutants. and i feel like his investments into renewable energy and fixing our climate cover his own potentially excessive energy use. hes invested a good couple billion into this and plans to invest billions more, and he wants of his money to be completely used up by around 10-15 years after he dies.