b'Four hundred years ago, Europeans arrived on the shores of the New World and built the city of Providence, professing gratitude that the indigenous population was being wiped away as if by the hand of God. Two hundred and fifty years ago, slave-holding Founding Fathers posited that all men are created equal.One hundred years ago, internal combustion and ammonium nitrate began conspiring to make SPAM, TV dinners, Cocoa Puffs, Big Macs and Twinkies inevitable. Fifty years ago, millions of Americans marched in hundreds of cities and towns on the first Earth Day.Twenty-five years ago, Timothy McVeigh detonated 4,800 pounds of ammonium nitrate beside the Oklahoma City Federal Building.Ten years ago, the words Deepwater Horizon and BP oil spill became synonymous with environmental disaster. Ten days ago, the Cameron Peak Fire, Colorados largest ever, was 92% contained, at 208,913 acres, or 326 square miles.Ten minutes ago, the Dow Jones Industrial Average was 29,444.77.Ten minutes from now, someone is going to go to beetcoin.org andchip in $25.Ten years from now, Greta will be 27 years of age, parts per million of CO 2in the atmosphere will be. . . ? And what, pray tell, will be the percentage of soil organic carbon at Soul Fire Farm? 16'