1. Sell solar power back into the grid

Solar panels are costly, so only the most committed environmentalists have thus far been willing to install them on the roofs of their homes and businesses. But new government programs that permit small renewable-energy producers to sell excess energy back into the power grid are making it easier for anyone to jump on the solar bandwagon. Last week, the Ontario Power Authority launched Canada’s first feed-in tariff program, which will offer a buy-back rate of up to 80.2 cents per kilowatt for solar power—more than seven times the rate paid for other forms of green power, like wind.

Want in? A grid-connected system at home, including installation, will cost about $10 per watt of output. If you installed a 2,000-watt system (at a cost of $20,000), then depending on your energy consumption you could bring in roughly $1,850 in revenue each year, recouping your investment in just over 10 years. And considering solar panels can last 30 years or longer, that’s a fairly sunny long-range forecast.—Jen Cutts

2. Fake trees

Trees, we all know, are carbon catchers. Problem is, they don’t catch enough of the stuff, and the process is slow. So scientists have built a better mousetrap, so to speak. According to a new report out of the U.K., the most effective way to reduce carbon dioxide (CO2) levels is to construct hundreds of thousands of artificial, greenhouse-gas-scrubbing trees.

Prototypes already exist—they’re made up of a type of mesh suspended between a two-pronged fork, and look like gigantic fly swatters. As air blows through the structure, CO2 binds to an absorbent compound, a process that removes the carbon 1,000 times faster then normal plants.
There are problems: the trees are expensive—more than $20,000 each—and “planting” 100,000 of them would offset only 60 per cent of the CO2 produced by a country the size of the U.K. With enough government funding, though, fake forests could start popping up around the world within the next few years.—Tom Henheffer Continue…