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To: willcousa who wrote (53627)6/9/2000 9:51:00 PM
From: pater tenebrarum  Read Replies (3) | Respond to of 99985
 
*OT* quite right. the giant magma chamber underneath Yellowstone Park comes to mind. if it were to erupt, the whole North American continent would be buried in 2-3 meters of volcanic ash and global temperatures would fall sharply for years.

also the last significant meteor collision dates back to 1908, and by sheer luck it took place in the middle of nowhere in Siberia. it is conceivable that one day a sizeable piece of rock will hit in a densely populated area and set human civilization back a few notches.

but to worry about such things is a waste of time...there's nothing that can be done about them should they be fated to happen.

we can however do something about emissions. an example is the effort to do something about curbing emissions of the substance (CFTC's i think) that is damaging the ozone layer.