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The SPF numbers on sunscreen bottles only refer to the level of protection against a type of radiation called UVB. But dermatologists say it's important to use a lotion that shields skin from UVA rays, too.
Web Extra: Key Sunscreen Ingredients
BALCO founder Victor Conte, convicted in the largest U.S. doping scandal, is back from prison.
The carbon emissions were counted and then offset by planting trees and other efforts.
June 21, 2007 · One in eight veterans under age 65 are without basic health insurance or access to a veterans' hospital, according to a new study from the Harvard Medical School. The study was the focus of a House panel hearing Wednesday.
June 21, 2007 · As Congress considers an energy bill, lawmakers plan a "greening" of the Capitol — with fluorescent lights, recycled paper and electricity from renewable sources, among other efforts. Yet the building gets its energy from a smoke-belching coal plant on Capitol Street.
June 21, 2007 · As a signatory to the Kyoto Protocol, industrialized nations must reduce their greenhouse-gas footprint to help slow global warming. For New Zealand, industrial emissions are not coming from factories, but from cow and sheep farms.
June 21, 2007 · Shopkeepers in one small town in England have stopped using plastic bags. Modbury, population 1,500, has become what some call the first plastic bag-free town in Europe.
June 21, 2007 · The astronauts aboard space shuttle Atlantis will have to stay in orbit for an extra day. Thunderstorms at the Kennedy Space Center in Florida have canceled both of Thursday's landing opportunities.
June 21, 2007 · Every year, thousands of do-it-yourselfers land in the emergency room from power-tool injuries. A look at which tools cause the most accidents, and tips on how to finish construction projects without ever seeing a hospital.
June 21, 2007 · The Environmental Protection Agency is proposing tighter air quality standards for ground-level ozone, the main component of smog. The agency's proposal would dramatically increase the number of U.S. counties rated as having unhealthy air. The ozone level standards were first set 10 years ago.
June 21, 2007 · President Bush vetoed a bill that would allow new federal funding for embryonic stem cell research. Alta Charo, professor of law and bioethics at the University of Wisconsin Law School, talks about what the federal ban means to researchers. Charo spoke with Steve Inskeep.
June 21, 2007 · Despite a drop in CD sales, the music industry is making its mark on the environment — landfills commonly have many CDs and MP3 players, which contain toxic metals and chemicals. Now some in the music industry are trying to limit the damage.
June 20, 2007 · Five years ago, the mammoth Women's Health Initiative startled women and their doctors with the finding that women who take menopausal hormone supplements have a higher risk of heart disease. Now, researchers from the same study say hormone therapy lowers the risk for some women.
June 20, 2007 · Asia has a thriving recycling industry that breaks down old computer equipment and takes out the precious metals inside. The only problem is that the metals contain chemicals that are potentially toxic to the people who are doing the work.
June 20, 2007 · The Netherlands Environmental Assessment Agency announced Wednesday that China has overtaken the United States as the world's biggest producer of carbon dioxide.
Climate change is big news. Is the buildup of carbon dioxide in the atmosphere leading to a crisis?
NPR Science Correspondent Robert Krulwich demystifies what's dense and difficult -- even if you feel lost when it comes to science in his podcast, Hmmm... Krulwich on Science. Updates: Mondays at 11 p.m. EST
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