Shift in ozone tear leaves uncertainty
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PUNTA ARENAS, Chile -- The worst of the ozone hole has pulled back once more to Antarctica this southern spring, leaving behind a shadow of uncertainty for the people living at the bottom of the Americas.
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Ozone, the pollutant that chokes the skyline on hot summer days, doesn&#39;t just singe the lungs. A new study suggests that ozone is also deadly - particularly so in Dallas.
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Politicians in the nation's capital have been reluctant to set limits on the carbon dioxide pollution that is expected to warm the planet by 4 to 7 degrees Fahrenheit during the next century, citing uncertainty about the severity of the threat. But that uncertainty may have shrunk somewhat with the release last week of two scientific reports suggesting that global warming is not just a hypothetical possibility, but a real phenomenon that has already started transforming especially sensitive parts of the globe.
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The amount of carbon dioxide in the Earth&#39;s atmosphere has increased faster than expected in the last two years, renewing concern that global warming may accelerate.
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Is a sea change about to occur? Don't count on it.
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The Environmental Protection Agency offered tighter standards for ozone pollution for the first time since 1997 but critics said on Thursday the proposal is more lax than what the EPA's own experts recommended.
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The daily average for ozone nationwide is about 40 parts per billion, but the level can be dramatically higher in summer, especially in urban centers, according to the paper in the Journal of the American Medical Association.
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Hurricane Charley's sudden increase in intensity and unexpected path show how difficult it remains for scientists to predict massive storms.
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Scientists at the U.S. Environmental Protection Agency on Tuesday recommended tougher standards for ground-level ozone, the main component of smog, but no action will be taken until next year.
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8 November 2004 - The Arctic climate is warming rapidly, much larger changes are in store due to increasing concentrations of greenhouse gases from human activity and the global impact such as rising sea levels will be âstaggering,â presenting one
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A small increase in ground-level ozone levels, still well below government thresholds, was linked to an increase in deaths the following week in large cities across the country, according to a study published today.
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A gaping hole in the ozone layer over Antarctica appears to have shrunk by about 20 percent from last year's record-breaking size, New Zealand scientists said on Friday.
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By Scott Streater, Fort Worth Star-Telegram, Texas  May 26--The federal Environmental Protection Agency continues to press the state over last-minute changes that appear to weaken an ozone clean-up for Dallas-Fort Worth.
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After reviewing more than a decade of air quality reports and medical records, a team of scientists says it has linked ozone to premature death.
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Scientists increased the alert level warning yesterday of the possibility of an eruption on Mount St. Helens, as they puzzled over the volcano&#39;s peculiar behavior.
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The Environmental Protection Agencyâs recommendation was the first since 1997 for ground-level ozone.
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Carbon dioxide levels in the atmosphere have grown more quickly than expected, say scientists.