It is expected to radically reduce the number of nuclear delivery vehicles and, for the first time, deployed warheads perhaps to less than 1500 weapons in the U.S. and Russian arsenals.

CENTERFORSECURITYPOLICY: Let Chiefs Lead on Missile Defense

It is expected to radically reduce the number of nuclear delivery vehicles and, for the first time, deployed warheads -- perhaps to less than 1500 weapons -- in the U.S. and Russian arsenals.

CENTERFORSECURITYPOLICY: Center For Security Policy

In order to save energy and taxpayer dollars, my administration -- led by Secretary Chu at Energy, as well as Administrator Johnson at GSA -- is doubling the number of hybrid vehicles in the federal fleet, even as we seek to reduce the number of cars and trucks used by our government overall.

WHITEHOUSE: Energy Security and Independence

To reduce pollution, between July 20th and September 20th the city is aiming to halve the number of private vehicles on the roads by allowing those with odd-number licence plates to drive one day, and those with even-number plates the next.

ECONOMIST: Business travel