envirmental science class question help(its on pesticides mostly)?
1. Explain how widespread use of a pesticide can increase the damage done by a pest that the pesticide was intended to control, and result in problem caused by the pest that did not cause the significant problem before the us of pesticeds to began.
2 distinguis between organic and inorganic fertilizer, and list the advantages and disadvantages of each.
3 what advantages and disadvantages of genetically modified crops and foods.
4 What role did rachel carson play for alerting people the dangers of widespread pesiticed use. what was the reaction of chemical manufacturers to her book, SILENT SPRING?
i know this looks like cheating, but im swapmed right now and my book got destroyed, and all i need is a helping hand. Id ask my teacher for help but i think hes out to get me!!
1. Widespread use of a pesticide will eventually lead to a degree of immunity. The result is that another type of pesticide will need to be used, which will lead to a build up of chemicals on the product/crop in question.
2. Organic fertiliser: leaches into water supplies, causing eutrophication
Inorganic fertiliser: DDT's
3. GM advantages: can give greater amounts of food in a smaller area, allow for crops to grow in places they would not have been able to before, can give nutrients cheaply that are not found in a product normally.
Disadvantages: can cause mutations within natural species, eg. giving herbicide resistance to weeds. Effects on humans not entirely known, can cause cross pollenation in other crops, meaning a loss in money.
4. Not a clue.
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