Harmful substances for crop that may affect food production
Answers
Answer:
The Effects of harmful substances in crop production:
The agrochemicals includes pesticides and insecticide. The agro chemical have positive impact on soil. They enrich the soil fertilizer. They may also enhancing the productivity, but the agrochemical cause has some harmful effect on the environment.
Explanation:
Pesticides are used to protect crops against insects, weeds, fungi and other pests.
Pesticides are potentially toxic to humans and can have both acute and chronic health effects, depending on the quantity and ways in which a person is exposed.
Some of the older, cheaper pesticides can remain for years in soil and water. These chemicals have been banned from agricultural use in developed countries, but they are still used in many developing countries.
People who face the greatest health risks from exposure to pesticides are those who come into contact with them at work, in their home or garden.
Pesticides play a significant role in food production. They protect or increase yields and the number of times per year a crop can be grown on the same land. This is particularly important in countries that face food shortages.
To protect food consumers from adverse effects of pesticides, WHO reviews evidence and develops internationally-accepted maximum residue limits. There are more than 1000 pesticides used around the world to ensure food is not damaged or destroyed by pests. Each pesticide has different properties and toxicological effects.
Many of the older, cheaper (off-patent) pesticides, such as dichlorodiphenyltrichloroethane (DDT) and lindane, can remain for years in soil and water. These chemicals have been banned by countries who signed the 2001 Stockholm Convention – an international treaty that aims to eliminate or restrict the production and use of persistent organic pollutants.