Word: globalization
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...first is a 12% increase in atmospheric carbon dioxide since the study began - the same CO2 increase implicated in global warming. The second is the warming itself. And the third is an increase in the growing season, defined as the length of time between the last frost in spring and the first frost in fall, which is also a consequence of warming. "We couldn't narrow it down further than that," says Parker. (See the top 10 invasive species...
...growth curve gradually bends upward, meaning the regrowth was accelerating - a hint, anyway, that controlled experiments involving enriched CO2 levels were indeed a reasonable if rough proxy of what would likely happen in the real world as CO2 levels mount. Whether the forests' growth spurt might actually impact global warming by absorbing and storing more carbon is doubtful. While it's true that more trees suck up more carbon, they also produce more dark, heat-absorbing foliage, which somewhat counteracts the benefit. In addition, one extra tree per acre per year doesn't make much of a dent...
...pictures of the global financial crisis...
...pictures of the global financial crisis...
...healthy and robust space program generates not just national esteem and extraordinary people but other developments as well, including the discovery of global warming, smoke detectors, and bar codes. And if one takes a long-term view of civilization, human expansion in our solar system is as inevitable as the journeys made across the Atlantic Ocean that ended in the New World. The solar system as a whole has land and resources equivalent to millions of Earths—to simply ignore it would be unimaginably shortsighted. The Moon alone, for instance, has enough fusion fuel to provide totally clean...