This week in 1600, South America experienced the most violent volcanic eruption in its recorded history. The volcano known as Huaynaputina, in Peru, exploded, and the impact was global. The surrounding area was devastated, of course – much of it buried in six feet of volcanic ash and rock. But the eruption also altered global climate, as major volcanoes sometimes do – with ash and other particulates flung into the sky blocking sunlight around the world, leading to falling temperatures. That in turn brought famines, floods, droughts, and waves of cold weather to various regions in the northern hemisphere. In fact, the eruption of Huaynaputina and other volcanoes around the same time probably contributed to the Little Ice Age: a period of historic cold weather around the world, from the 1600’s to, arguably, the 1800’s. Continue reading “This week in history: Huaynaputina”
Many Americans doubt man-made global warming because they don’t think humans could so fundamentally change the world. Some believe only God could alter the climate. But small groups of Homo sapiens have been re-engineering the environment on a massive scale for thousands of years, using only primitive tools. Many scientist think that includes ancient man-made global warming.
Most of us know that humans have been cutting down forests and wiping out animal species for millennia. But we rarely recognize the scale of past people’s impact Continue reading “Ancient Man-Made Global Warming and Environmental Engineering”