"WASHINGTON -- Greenhouse gas emissions from medium-duty and heavy-duty trucks and buses will be regulated by the federal government for the first time beginning in model year 2014 under an official Memorandum issued [May 21] by President Barack Obama.
"America has the opportunity to lead the world in the development of a new generation of clean cars and trucks through innovative technologies and manufacturing that will spur economic growth and create high-quality domestic jobs, enhance our energy security, and improve our environment," the President says in the memorandum.
At the White House signing ceremony, Obama said, "This is going to bring down the costs for transportating goods, serving businesses and consumers alike. It will reduce pollution, given that freight vehicles produce roughly one fifth of the greenhouse gas emissions related to transportation." "