The state of California in the US has a program that educates consumers to buy cars that emit fewer pollutants.



The tag is required and quite simple, indicating the gases responsible for the greenhouse effect and smog which are ubiquitous in that region. Now the CARB (California Air Resources Board) is publishing the marks from zero to ten of all the commercialized cars in the state on its site DriveClean.

Brazil is not far behind, with a similar idea for vehicle tagging, launched in the last Automobile Show in Sao Paulo. The tag shows the consumption of ethanol and gasoline for each car, similar to the tags stuck on all kitchen appliances which have been required for some time now.



The tag does not inform the consumer about harmful gases, however it does help to choose a more economical and consequently a “cleaner” car. As opposed to the American program, having the tag is not a requirement for auto makers. The data is published in the Inmetro’s (National Metrology for Industrial Quality and Normalization Institute) website.