Use of oil with tetra ethyl lead causes much pollution, with lead containing carbon monoxide, nitrogen oxide and policyclic nitro hydride.

The process is different from the one implemented in France in Sweden, ethanol is used pure as fuel, whereas in France it is mixed with isobutylene to yield ethyl tertiary butyl ether which is then blended with traditional fuel.

At the Mayak Industrial Reprocessing Complex in Russia s southern Urals, a storage tank holding nitrate acetate salts exploded in 1957, releasing a massive amount of radioactive material over 20,000 square kilometers, forcing the evacuation of 272,000 people. In September 1994, an explosion at Indonesia s Serpong research reactor was triggered by the ignition of methane gas that had seeped from a storage room and exploded when a worker lit a cigarette.