Word: sulfured
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...experts say, on what you want them to do. "Not every product does everything," says Nancy Culotta of Michigan's NSF International, an Ann Arbor-based industry watchdog group. Some filtering systems, she notes, merely improve the water's taste by getting rid of relatively harmless inorganic chemicals like sulfur or chlorine. Others do a creditable job of removing lead but aren't designed to purify water tainted by bacteria or other pathogens. And many of the most popular systems need to have their filters frequently replaced, or owners will wind up running their tap water through the high-tech...
...over the past century or so, the results didn't mesh with reality; the models said the world should now be warmer than it actually is. The reason is that the computer models had been overlooking an important factor affecting global temperatures: aerosols, the tiny droplets of chemicals like sulfur dioxide that are produced along with CO2 when fossil fuels are burned in cars and power plants. Aerosols actually cool the planet by blocking sunlight and mask the effects of global warming. Says Tom Wigley, a climatologist at the National Center for Atmospheric Research and a member of the international...
...huge rivers of flowing lava. But amid the basalt, which extends across an area of a million square miles, scientists have also found telltale pieces of tuff, a type of rock indicative of powerful explosions. What this means, says Renne, is that the volcanoes could have easily hurled sulfur dioxide and other gases high enough into the atmosphere to block sunlight and cause substantial cooling. And if the earth cooled enough--locking up more and more water in polar ice--the sea levels would have plummeted...
...Siberian eruptions could have killed off plant and animal life in half a dozen different ways. An atmospheric mist of sulfur dioxide, for example, could have stoked lethal storms of acid rain. Carbon dioxide, injected into the atmosphere by erupting volcanoes, could have trapped solar heat, disrupting climate through global warming. Even the physical force exerted by the rising plume of molten magma could have contributed to the extinction by uplifting a substantial section of the earth's crust. Since temperatures fall with elevation, says Renne, snow and ice would have quickly accumulated, wrecking ecosystems at higher elevations and contributing...
...place of punishment but also a punished place, and nuclear trauma was but one of the tortures visited on the land. Possibly the largest single source of air pollution in the world is a complex of smelters in Norilsk in central Siberia; it pumps 2 million tons of sulfur, along with heavy metals and other poisons, into the air each year, contributing heavily to a noxious arctic haze that plagues residents of the northern latitudes as far away as Canada. Siberian industrial emissions contribute heavily to the threat of global warming, which in turn may come back to burn...