  How to keep your summer travel footprint to a minimum with tips for green vacations, and more ...
| |  | If your current air conditioner is more than eight years old, it's time for a new one. Over the life of the product, the amount you'll save in energy bills will more than likely exceed the cost of the new unit.
Get more shopping and usage tips. > 
 | | Get tips for taking the best landscape shots and make lasting memories of your summer travel. |
 | | Find the best gear for summer vacation with Adventure magazine's Gear Guide. |
 | | How much do you know about the stuff spilling into the Gulf of Mexico? Find out by taking this quiz. |
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 | | See pictures of lightning in its many forms, and learn more about the danger it poses. |
 | | See photos of tornadoes, waterspouts, and the destruction they cause. | | 
 | | Flood-tossed RVs and mangled campsites were left behind after a flash flood ripped through a national forest in Arkansas last weekend, killing at least 20. |
 | | Ecuador plans to forgo drilling for oil in one of the world’s most diverse ecosystems, in exchange for money from the developed world. |
 | | Water expert Peter Gleick takes us on a journey through bottled-water plants, Kabbalah centers, and what it means to be a water sommelier. | |  | 
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