US energy utility PacificCorp has said it will close down a number of coal fired electricity plants early by 2022. The plants are all based in Wyoming, and the reason is purely economic – keeping them open will cost too much money. This is despite local laws again coal closures, in what is a state that violently opposes renewable energy. PacificCorp has plans to replace the coal plants with a combination of wind, solar and batteries and reckon it will save the company $248 million. PacificCorp is owned by Warren Buffet’s Berkshire Hathaway and operates as Rocky Mountain Power in Wyoming, Utah and Idaho and has around 1.9 million customers. Warren Buffett continues to tie money up in fossil fuel…