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

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