United States

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  Cold Weather Planning: Seven Steps to A Warmer Home

  December 25, 2012; 1:31 PM

  As cooler weather nears and nights take on a chill, you may find yourself dreading the arrival of your energy bill. Driving that bill down, however, requires taking a few steps.

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  Why We Have Daylight Saving Time

  November 01, 2012; 1:15 PM

  While the number of hours in our days doesn't change, the number of hours of daylight does. Most of the United States follows daylight saving time to combat "shorter" days. But why?

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  Warm Up the Planet, Shrink Down the Species

  September 13, 2012; 10:37 AM

  There is one horse that was known to shrink as the Earth warmed up. Valerie Smock has more.

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  12 Quick Ways to Save Household Energy

  September 09, 2012; 9:22 AM

  Most are fairly easy DIY jobs and will pay you back in savings fairly quickly.

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  Saving Energy Can Help Save the Planet From Climate Change

  September 06, 2012; 9:15 AM

  Even though the climate may be changing, there are still ways to help reduce greenhouse gases. Valerie Smock has more on how to do it.

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  Simple Energy-Efficient Tips That Save Money

  September 05, 2012; 9:33 AM

  Taking energy saving steps now pays big dividends in the future.

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  Quiz: Are You An Energy Saver or an Energy Waster?

  September 04, 2012; 9:49 AM

  Energy use correlates directly with how much you pay each month, and the size of your personal carbon footprint. The following infographic takes a look at two hypothetical homeowners: Andy and Randy.

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  How Atomic Clocks Keep the Most Accurate Time

  September 04, 2012; 5:55 AM

  Used to set the Coordinate Universal Time (UTC), the NIST-F1 will not gain or lose a second over nearly 100 million years.

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  Lighten Up: Saving Energy with CFL Bulbs

  September 01, 2012; 9:13 AM

  Swapping traditional light bulbs for compact fluorescent bulbs (CFLs) is one of the easiest ways to start saving energy at home and at work.

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  9 Most Green-Friendly Hotel Chains in the U.S.

  August 29, 2012; 1:27 PM

  Sometimes when you’re traveling, just can’t help it – you need easy and fast when it comes to where you lay your head.

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  Tiny Factory Could Make Solar Panels Anywhere

  August 22, 2012; 1:22 PM

  A tiny robot factory could make solar panels as efficiently as an entire Chinese factory.

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  10 Instant Steps to a Greener Home

  August 19, 2012; 12:04 PM

  Use these quick and easy tips to help turn your home into an eco-friendly environment.

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  The Real Reason CO2 Emissions in US Plummeted

  August 18, 2012; 10:24 AM

  The shift from coal to natural gas helped fuel a drop in carbon dioxide emissions this year.

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  What Steps Can Small-Business Owners Take to Make Their Enterprises Greener?

  August 11, 2012; 12:15 PM

  There are many ways to green up any business, large or small—and an added benefit might just be saving money.

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  Energy Efficiency Not Likely to Backfire

  August 08, 2012; 1:32 PM

  If your car got better mileage, would you drive more? Probably, but not enough to offset the fuel economy gain

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  How Green is Your College?

  August 08, 2012; 9:21 AM

  A survey scores institutions in 139 categories, including energy use, waste management, public engagement, innovation and green research.

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  Cooling Your Home Naturally

  July 25, 2012; 12:55 PM

  There are several methods to reduce or even replace the use of an air conditioning system by using non-mechanical ways to keep your home cool when it's hot outside.

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  5 Key Strategies for a Plastic-Free Life

  July 24, 2012; 1:42 PM

  We’ve reduced, reused, and fretted over Ziploc bags for an entire month, and now it’s time to turn all those lessons learned into words we can live by.

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  Greenhouse Gas Emissions Continued to Climb in 2011

  July 21, 2012; 10:43 AM

  Developing nations, particularly India and China, drove 2011's increase in carbon dioxide.

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  A Tale of 2 Transit Systems: Battery-Powered Buses Enter the Mainstream

  June 11, 2012; 9:39 AM

  Using stimulus funds, two transit systems in California and Washington State pioneer a cleaner, greener and less expensive method of transportation.

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  More Garbage Means More Greenhouse Gas Emissions

  June 07, 2012; 11:56 AM

  The world's cities have a trashy habit that could make the impacts of climate change even worse.

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  Tipping Point? Earth Headed for Catastrophic Collapse, Researchers Warn

  June 06, 2012; 1:34 PM

  At a certain threshold, the environment behaves in unpredictable ways.

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  E-Bikes Make History as Alternative Transport, Displacing Millions of Tailpipes

  May 20, 2012; 1:36 PM

  The 21st-century equivalent of the cavalry has come charging in to rescue cities in China and South Asia in their battles against air pollution and global warming.

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  7 Steps to a Greener Home

  May 05, 2012; 11:44 AM

  In 7 simple (and inexpensive) steps you can transform your home life into one unburdened by the guilt that comes from waste, consumption and toxins.