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Cyber Attacks Put Spotlight on Digital Security July 8, 2009 Analysis Recent attacks on government computers, private organizations and foreign governments have raised fresh questions about the nation's digital security.

New Billboard Clocks Emissions June 30, 2009 Report Eight stories above midtown Manhattan, a new billboard has begun counting how fast greenhouse gases are entering the atmosphere. Heidi Cullen of Climate Central Reports.

Alternative Fuels January 28, 2009 Carmakers are looking to alternative fuels such as ethanol, natural gas and hydrogen to improve fuel economy, decrease greenhouse gas emissions and transition from foreign to domestically produced fuels. In this in-depth report, learn about the science and politics of alternative fuels, and explore how your car's fuel costs and emissions stack up to similar alternative fuel vehicles.	Contact Us Sign up for e-mail alerts, request science DVDs or send us comments on our science coverage. RSS Feeds Get the latest science updates and in-depth reports. Podcasts Download audio versions of our science reports.

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