Other steps discussed at the conference range from the practical, such as replacing biomass fuels with kerosene or natural gas, to the idealism of cities developed so that no cars are needed, and thus no car-related pollution is generated.
Don't make the mistake we made with the car culture I would like to comment on one thing the questioner asked, because I was impressed that he is concerned that if everyone has a private car, air pollution will grow worse.
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To cut pollution, car use in Mexico city will have to be restrained.
Fewer car journeys means less pollution, fewer road accidents and shorter traffic jams, all of which would be welcomed my many.
They can't require you to buy a car with an anti-pollution device.
We then ranked these areas equally based on number of per capita fatal car accidents, amount of particle pollution and length of travel delays.
Politicians who worry a lot about car-industry jobs are also beginning to realise that there can be votes in curbing car use where congestion and air pollution are worst.
The White House and the auto industry teamed up to defeat Senator John McCain and me when we tried to modestly improve car and truck efficiency while cutting pollution and reducing our dependency on foreign oil from nations that support terrorism.
It would ease pollution and congestion in the car-choked cities as well.
But a few days later, I whizzed through the pollution check for my ancient car at the Seattle testing station in just 13 minutes.
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As I zip silently around the San Francisco Bay Area in a new Ford Focus Electric, the stylish battery-powered car emits not a molecule of carbon pollution.
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She is concerned that the increase in the number of car journeys and flights would bring excess noise and pollution and affect property prices on the marsh.
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Thus, because a driver's private motoring costs do not reflect the costs he imposes on others in the form of pollution and congestion, he uses the car more than is socially desirable.
Each car was scored for its performance in terms of air pollution, fuel efficiency and carbon footprint ratings.
Planes cause at least twice as much pollution per passenger mile as a typical private car but the day when even gas-guzzling private cars will require carbon allowances is drawing closer.
And while the current Colosseum project aims to improve visitor services in addition to cleaning and restoring the amphitheater, Quaedvlieg-Mihailovic believes that its underlying problems also need to be addressed -- the main one being the car traffic that surrounds the site and causes the exterior to be tarnished with pollution.
Brian Moorland, a spokesman for Travelwise NI, a government campaign to save energy and cut pollution, said he was pleased the hospital was helping them to highlight their car-sharing scheme.
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The authors say a higher limit could increase gas emissions and air pollution and could lead to increased obesity, with more people taking advantage of shorter car journeys.
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The number of vehicles entering the City's square mile has been cut by 25%, pollution is down by 15%, road accidents have been reduced by more than a third, and car crime has been halved.
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