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A quirky helix-shaped wind turbine is an experiment in boosting wind speed to make wind energy viable in low-wind locations, such as cities and suburbs.
V Squared Wind, a finalist in the Clean Tech Open, is one of few companies trying to accelerate wind to get more usable energy, particularly in marginal wind areas.
Start-up Optiwind is testing whether there is a middle ground for wind power to serve schools, farms, and businesses with marginal wind resources.
Army will test WindTamer's small wind turbine for charging communications equipment. Company is one of a handful seeking alternatives to traditional three-blade design.
Wind turbine start-up is seeking funding to build prototypes of a turbine that its says is cheaper than traditional turbines and can be used for more distributed applications.
WindTronics says its $4,500 Honeywell Wind Turbine will generate electricity starting with 2-mile-per-hour wind, addressing one of the biggest barriers in small wind.
There are relatively few community wind projects in the U.S., but some companies are developing mid-size turbines for schools or big-box retail outlets.
Researchers find that seeding ocean with iron to feed plankton and sequester carbon has flaws, while debate continues over land use affects carbon emissions from ethanol.
Even the sweatiest palms aren't safe.