More from Mikhail Rebrov's 'Save our Earth'

More from Mikhail Rebrov's 'Save our Earth':'"Twenty thousand years ago ,in the Ice Age , a glacier blocked the river flowing across the present state of Washington,to form a glacial lake behind this natural dam.With an area of eight thousand square kilometers,it had half the water mass of Lake Michigan today.Little by little,water undercut the glacier making it unsteady and eventually the day came when the ice dam collapsed,abruptly and all at once,the lake spured through the breach hurtling down nearly 400 thousand cubic meters per hour.In less than an week the lake emptied in fierce torrents of waves leaving behind 180 square kilometers of disfigured stony deserts."