This letter is in response to Joseph Hardy’s op-ed of Aug. 2, in which he offers hope regarding climate change. The writer bases it on personal observations of vast arrays of wind farms in Wyoming and on learning of China’s advances in solar cell technology. He also cites several consequences of climate change but doesn’t give them the significance they deserve. I don’t know how one can be hopeful in the face of increasing storms that produce flooding; ocean warming that is expected to raise ocean levels so that coastal cities are flooded; melting of polar ice that will also…