Even while we profess to care deeply about the climate changing, Americans don't seem to be raring to change their lifestyles much - especially when there's a long weekend at stake. Over 37 million people will take trips during the three-day Memorial Weekend of more than 50 miles. Those numbers are up from last year - high gas prices be damned. Nobody wants to be stuck at home on the first official weekend of summer, but people, please: spare a thought for your ecological impact.