2. The practice of cultivating the land or raising livestock In a healthy farming system, agriculture works with the natural environment. This begins with healthy soil that stores water and nutrients and provides a stable base to support plant roots. In a sustainable system, soil is kept in balance. Crops should be rotated through the fields to replace nutrients in the soil that were extracted during growing. Where there is livestock, animals graze the land, then waste from those animals is used to fertilize the soil, for annually plantation.

3. How do pesticides hurt the environment? 1. Pesticides damage ecosystems 2. Pesticides may damage or harm un-targeted animals 3. Pesticides decrease biodiversity 4. Pesticides may cause a decline in populations or even cause extinction of species 5. Pesticides is capable “mess up” food chains/webs 6. Pesticides disrupt the natural balance in ecosystems

4. .Species that pollutants affect.

5. What is run-off? – Surface runoff is the water flow that occurs when the soil is full from rain, melt water, or other sources that flow over the land. This is a major component of the water cycle, and the primary agent in water erosion. Which can carry the harmful pollutants to drinking water for people and animals.

6. Sources http://www.biologyreference.com/Gr- Hi/History-of-Agriculture.html http://www.biologyreference.com/Gr- Hi/History-of-Agriculture.html http://farhanwarsi.tripod.com/id9.html