Article snippet: The Heartland Institute //&nbsp Posted at 5:37 pm on January 4, 2017 by The Heartland Institute By. H. Sterling Burnett, Ph.D. Climate change is real and has happened throughout history on local, regional, continent-wide, and global scales, driven by a variety of atmospheric, cosmic, geologic, and meteorological factors. Beginning in the latter half of the 20th century, some scientists—and later environmental lobbyists and politicians—began to worry Earth was changing in ways detrimental to humans and the environment. As Earth cooled modestly from the 1940s through the late 1970s, scientists began to warn of—and headlines began to trumpet—the coming of the next ice age. By the 1980s, however, the purported problem shifted, and scientists and environmentalists began to warn human-created greenhouse-gas emissions, primarily carbon dioxide resulting from burning fossil fuels, are warming the planet and that global warming would cause all manner of catastrophic climate changes—unless humans take extreme actions to stop it. What We Know Below, briefly, are the facts about greenhouse gasses and the purported human-caused global warming/climate change: Beyond these few statements, almost every other aspect of the climate change controversy is open to debate. Differences between the claims made by those who believe in the theory human greenhouse-gas emissions significantly affect the climate and the actual measured changes strongly indicate humans are not causing a ... Link to the full article to read more