No car days work in some countries.
China is holding a No Car Day in more than 100 cities as it tries to reduce smog ahead of the 2008 Summer Olympics. Beijing onthe other hand was very unsuccessful
But correspondents say that in the capital National No Car Day appears to be making little impact, with high levels of traffic and most streets open as normal.
Environmental campaigners say China must overhaul its transport system to tackle pollution.
Is a No Car Day the way to combat pollution? Or does it just hit personal freedom?
How else can we address the problem?
Cheers

