Indo-Asian News Service: The quantum of carbon dioxide emissions from vehicles anticipated in the year 2050 could be cut down to 2000 levels if all cars on the roads were hybridised, a new study has shown. The study also found that doubling of population density in large US cities by 2050 would have a greater impact on carbon dioxide reductions than full hybridisation of the vehicle fleet. The study by Brian Stone, associate professor at Georgia Institute of Technology, looked at 11 major metropolitan …