Introduction to unleaded gas
Since the early 1930´s, lead compounds have been used to improve the car engine efficiency.
Road traffic is one of the major sources of contamination, being responsible for 90% of the total atmospheric lead emissions in most urban areas.
The automobile transport is responsible for 1/5 of all global CO2 emissions. Most countries have already withdrawn gasoline with lead, while different additives have emerged as a valuable substitute.




