Should the lesser prairie chicken become listed as threatened or endangered - and it's close now - there would be significant restrictions on companies hoping to plant towering turbines across a five-state region believed to have some of the nation's best wind energy potential. "We've never seen the likes of this," said Texas Parks and Wildlife Department wildlife biologist Heather Whitlaw, who is part of conservation efforts with the other states and believes the bird could be listed within two years. "Anybody who puts anything on our landscape would be evaluated in one form or another."

The SunZia transmission line that would link sun and wind power from central New Mexico with cities in Arizona is just the sort of energy project an environmentalist could love -- or hate. And it is just the sort of line the Interior Department has been tasked with promoting -- or guarding against. If built, the 460-mile line would carry about 3,000 megawatts of power, enough to avoid the need for a handful of coal-fired plants and to help utilities meet mandated targets for use of renewable fuel.

Engineers at Sandia National Laboratories have designed a data system which can continuously track the performance and of large wind turbines that produce electricity. The project, called Accurate Time Linked Data Acquisition System II, is contained in shoebox-sized aluminum structure that contains data-collection equipment and lightning protectors.

Bingaman said he had supported tax credits aimed at developing wind power plants. With those credits ending in 2007, he said companies developing those operations were getting wary about starting new projects. The senator said he would propose extending those credits.

While the industry portrays electricity-generating windmills as a benign and natural source of power, community opposition to new windmill farms is cropping up across the country - particularly in Eastern states, where there are more people fleeing urban blight to live in idyllic rural towns.