| There are various sources of chemical risk associated with plant foods. This overview of the topic will highlight areas of scientific and popular interest. There has been a great increase in the synthesis and production of chemicals in this century, especially in the past 50 years. Sixty to seventy thousand chemicals are now in regular use and production in the USA increased from 8 million tons a year in 1945 to 107 million in 1985 an increase of 1200% |