For chemicals, the chemical regulation is usually expressed in parts per million (ppm), or sometimes in milligrams per cubic meter (mg m3).

It's exactly equivalent to taking one 325 milligram aspirin tablet, throwing it into the middle of Lake Tahoe, and then stirring it up, obviously with a very big stick, and waiting two years or so until the solution is homogeneous.

The simulations, carried out on the relatively limited computers of 1973, were nonetheless able to predict that a more realistic three degrees of separation existed across the U.S. population, foreshadowing the findings of American psychologist Stanley Milgram.

Mr. CHANDRANSU (Thailand) said that the death penalty was imposed for drug trafficking offences involving the import, export or production of 300 milligrams, or equivalent, of LSD or 1.5 grams or equivalent of amphetamines.