text: Rush hour would never be a problem again if cars where not an opotion anymore. The evidence says that " President obama's ambitious goals to curb the united states' greenhouse gas emissions, enveiled last week, will get a fortuitous assist from an incipient shift in american behavior : recent studies suggest that americans are buying fewer cars, driving less and getting fewer licenses as each year goes by ". This can result in good out comes for people all across the world.