Steelers and Bills <| sep |> I ' m not arguing against human involvement in climate change . It ' s really easy to say the world would be soo much better without our industrialization and materialistic lifestyle . Donald Trump also connected these two topic this week , but they are different . When you may have to go to war , you have to have an honest assessment of your strength , the strength of the enemy , the terrain , possible plans of attack . You need this whether you decide to go to war or not to make a good decision . In the same way , an honest assessment of the impact of climate change is independent of the question what to do about it . The energy sector is not that important any more . In the 70 s oil still produced an economic crisis . The low oil prices the last years hardly did anything to stimulate the economy . The energy sector is only 6 % of the world GDP . We have to solve the problem by 2050 , by that time we will twice as rich . Thus only when a green energy system would be 100 % 6 % 16 times as expensive would this lead to a reduction in wealth . That seems unreasonable given that in regions with good sun , solar energy is already cheaper . The larger the market becomes , the more the prices go down . Thus more likely it would not be much expensive in the end , while we would have less damages from climate change and less costs for adaptation .