Best to stop watching Fox News and listening to Trump.  Yes, the earth has been heating and cooling for over a billion years.  What real scientists (not ones paid off by the coal, oil, and gas industries) have discovered is the RATE of heating is faster and more extreme than anything we can discover in the the fossil record or in ice borings from places like Greenland and Antarctica.  Also where did you get your "facts" about declining manufacturing, and loss of jobs? If you're talking about the US Midwest, maybe, but not globally.  Seems you also must watch Fox Business News.