The previous posting, examined the study “A roadmap for rapid decarbonization” published in the Science magazine, and discussed the major obstacles the warmers face in their attempt to persuade the politicians and the voters to undertake decarbonization. And do it rapidly. You may not think thirty years is rapid, but convincing 8 billion people to wipe out the present infrastructure and substitute a new one using as yet unproven methods in 30 years, is moving at a breathtaking speed.
The above noted study, is not the only one that has looked at a way to satisfy the Paris Agreement of holding the global temperature to max.2 ºC rise, with a goal of 1.5ºC rise. A study by 100% Clean and Renewable Wind, Water and Sunlight (WWS) led by Jacobson, Delucci , et at. is, on the surface (number of pages of detailed discussion), more elaborate than the previous posting. This WWS roadmap calls for an 80% reduction of fossil fuels by 2030! Only 13 years away.
The WWS study is an all-sector roadmap that is said to show how 139 nations could jointly hold the temperature rise to no more than 2ºC.
Friends of Science critique the WWS study with a response titled “WHY RENEWABLE ENERGY CANNOT REPLACE FOSSIL FUELS BY 2050” . Michael Kelly, Professor of Electrical Engineering at Cambridge says: “Humanity is owed a serious investigation of how we have gone so far with the decarbonization project without a serious challenge in terms of engineering reality”.
That’s what guides this critique. The critique illustrates the enormous number of new renewable facilities needed, the time necessary to put these facilities in to operation and the amount of space they require. It is awesome.