An international organization established by the United States and Canada and certain Western European countries in 1960. The OECD studies and discusses trade and related matters. Members include the United States, Canada, European Union countries, Australia, New Zealand, Japan, and Turkey. Most recently Mexico and South Korea have become OECD members. These inspection techniques are not adequate to detect foodborne pathogens that are of growing concern.
Parathion is an example of an organophosphate.
In the stratosphere 7 to 10 miles above the Earth, naturally occurring ozone acts to shield the Earth from harmful radiation. In the 1970s and 1980s, it was discovered that emissions of certain chemicals catalyze destruction of stratospheric ozone, allowing more radiation to reach the Earth's surface. The U.S. is a signatory to the 1987 Montreal Protocol on Ozone Depleting Substances, which bans or limits uses of chemicals whose emissions deplete stratospheric ozone. Among the chemicals being phased out as ozone depleters are chlorofluorocarbons used in refrigeration and air conditioning and methyl bromide, a pesticide. Tropospheric ozone forms from reactions between nitrogen oxides and volatile organic compounds in the presence of sunlight.