Casey asserts that there is mounting evidence that the Earth is getting cooler due to a decline in solar activity. He warns in his latest book, Dark Winter that a major alteration of global climate has already started and that at a minimum it is likely to last 30 years.
https://www.google.com/search?q=climatologist+john+casey&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=sb
https://www.google.com/search?q=climatologist+john+casey&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=sb