As Mike Millikin sees it, we're in for a rough ride over the next decade or two as fuel prices rise, natural resources grow scarcer, and chaos looms. But fear not (well, not too much anyhow): In answering reader questions, Millikin, sustainable-mobility expert and publisher of the blog Green Car Congress, points to lots of positive transport trends and offers a number of suggestions to empower you -- yes, you! -- to help jumpstart change.