Standing in his Roush Fenway Racing trailer at Texas Motor Speedway, Greg Biffle smiled widely at the suggestion that he may just be NASCAR's "greenest" driver. Having grown up in southern Washington state in the small town of Vancouver -- located on the Columbia River, alongside the Washington/Oregon border -- Biffle is well aware of the rustic, uber-environmentally conscious stereotype assigned to America's Northwest. "Yes, it tends to be the greener part of the country," Biffle said with a smile. As NASCAR celebrates its Race to Green initiatives this month, it's clear to Biffle this race should be a sustained enduro instead of a sprint to the finish. More...