A debate over whether it is best to harness wind energy with horizontal-axis devices or vertical-axis devices has raged for thousands of years. Even how the technologies evolved is under some dispute.

When most people think of wind power they think of large-scale wind farms with fields of huge three-bladed horizontal axis turbines. With such farms requiring lots of room they are generally ...

Propeller wind turbines are the most common way of using one of the most abundant energy sources on Earth to generate electricity. The tall three-bladed fans are the ubiquitous symbol of wind energy, ...

Virtually every week there are articles about new and innovative methods for harvesting wind energy. And every week more megawatts of capacity from three-blade horizontal-axis wind turbines (HAWT) ...

The list of renewable energy options for homes is growing almost by the day, and one of the most popular solutions is a VAWT (vertical axis wind turbine). The main difference between these units and ...

A "wind tree" installed at the COP21 climate talks in Paris. Each tree produces enough energy to light 71 parking spaces (or power one average American home for four months). Courtesy New Wind ...