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That's the impact of breaching only one of nine planetary boundaries that Rockstrom identifies in the paper. Other boundaries involve freshwater overuse, the global agricultural cycle and ozone loss. In each case, he scans the state of science to find ecological limits that we can't violate, lest we risk passing a tipping point that could throw the planet out of whack for human beings. It's based on a theory that ecological change occurs not so much cumulatively, but suddenly, after invisible thresholds have been reached. Stay within the lines, and we might just be all right...
...three of the nine cases Rockstrom has pointed out, however - climate change, the nitrogen cycle and species loss - we've already passed his threshold limits. In the case of global warming, we haven't yet felt the full effects, Rockstrom says, because carbon acts gradually on the climate - but once warming starts, it may prove hard to stop unless we reduce emissions sharply. Ditto for the nitrogen cycle, where industrialized agriculture already has humanity pouring more chemicals into the land and oceans than the planet can process, and for wildlife loss, where we risk biological collapse. "We can say with...
...term - it's possible that the atmosphere will be able to handle more carbon or that catastrophe could be triggered at lower levels. And by setting a boundary, it might make policymakers believe that we can pollute up to that limit and still be safe. That's not the case - pollution causes cumulative damage, even below the tipping point. By focusing too much on the upper limits, we still risk harming Earth. "Ongoing changes in global chemistry should alarm us about threats to the persistence of life on Earth, whether or not we cross a catastrophic threshold any time soon...
...crusty alumni and friends. It may be worth trying to mooch some nice booze and grub off of these reminiscing middle-aged men, but your best bet is probably hosting or attending a pregame in someone’s suite on campus. This is especially the case since all but this Friday’s game begin at around noon, and waking up early to go setup a tailgate just goes against everything Harvard students believe in. This Friday’s game and The Game are the two exceptions: the tailgates before these games will be much more...
...danger, always try to walk with someone. Be aware of your surroundings,” he said. A BPD spokesperson said that investigators have strong leads in the murder of the teenager and are looking into a number of possible suspects in the other murder case. The pregnant victim, Paola Castillo, was fatally shot while celebrating her 18th birthday early Sunday morning by an uninvited guest who had recently been ejected from her party. On the same day, a house party in Dorchester ended in chaos when apparently unprovoked gunfire broke out, killing 21-year-old Carl Hentz Belizaire...