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Energy | Electricity: ho! The next energy frontier may be the ocean. Companies like SeaGen Tidal Energy are building what are essentially upside-down windmills (as well as buoys and turbines) in the sea to take advantage of tides, waves, and currents, reports Discovery Channel Magazine. The SeaGen generator being tested off Northern Ire-land may provide enough green energy for 1,000 homes.
| Kinesiologist Max Donelan has invented an admittedly bulky prototype of a knee brace that generates electricity from the wearer's stride. According to Time, scientists are also working to harness energy from bridge vibrations, raindrops, beating hearts, and other everyday sources-to power devices big and small.
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| Money
| Some new ideas floated by U.S. economists and experts, gathered by the Washington Post.
| Sometimes it pays (literally) to review your budget and see where money goes and how you can hold on to it. Quicken_online.com (newly free) and mint.com let you track expenses, get bill reminders, and see your checking, savings, and credit card accounts in one place. Bonus: personal pie charts!
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| Environment
| How do satisfaction, longevity, and the environment correlate? At happyplanetindex.org, you can check out a map of 178 nations and see where everyone stands. Bestfootforward.com details how companies can reduce environmental impact. Onehundredmonths.org ticks off the time we have until the effects of global warming are deemed irreversible. (FYI: They say we've got until December 2016.)
| By land and by air, North Americans rack up the equivalent of 200 million trips around the earth each year, according to David Suzuki's Green Guide (Greystone Books, $19.95). One antidote: the “walking school bus.” Adults lead kids on a fixed route, combating global warming and obesity. Go to saferoutesinfo.org and walkingschoolbus.org.
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