...And not only that, it can cost the same in Texas. As the Houston Chronicle reports, Green Mountain Energy now offers Houston-area customers electricity from all-renewable sources for the same price as the non-green power sold by the area's major producer, Reliant Energy. Though there are other local providers that have lower rates, Reliant's was the "price-to-beat", and it's a trend that will only continue as oil prices rise. Over the next few years, green power will get more and more competitive, even without advances in renewable-generation technology.