It's tempting to leave the car idling for a few minutes when picking up the kids from school or waiting for someone at the station.
Did you know that when engines are left to idle they continue to release CO2 as well as damaging hydrocarbons that cause asthma? Apparantly the air intake closes when a petrol engine is idling, so it has to work harder to function, whereas diesels simply use less fuel when idling, making them more efficient.
Transport for London is urging everyone to switch off their vehicle engines if they are waiting for more than 60 secs. This small change can have a big impact in terms of saving both fuel and harmful emissions.