Don't choke Britain! This month's theme is TRANSPORT.  The way we travel can contribute to pollution.  Here are some ideas to improve the air we breathe: Try walking, cycling or using public transport for a journey when you would usually take the car – particularly for short journeys. Share car journeys with friends and family – especially going to work or school. If you have to stop the car for more than a minute, turn the engine off – it will cut down on exhaust fumes. Did you know that when you are sitting in traffic you can receive up to 3 times more pollution than pedestrians. Take a ride on the National Cycle Network during Ride the Net week (19-23 June) By June 2005, 8,000 miles of the network will be created, passing within 2 miles of 20 million people. Call Ride the Net on 0117 915 0107 for more details.