Explain how human interference has changed the ecosystem and the climate ?
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While people who live in towns and cities may not ever see the farms that support them, we are all dependent on agriculture. That agriculture has a huge effect on our ecosystems: pesticides and other toxic chemicals used in food production can wash downstream, killing many types of animals, polluting our waterways and even making humans ill. Fertilizers can wash downstream, causing "blooms" or large populations of algae and bacteria, which can harm fish populations. In addition, GreenFacts states that we are depleting fish populations in the oceans and seas, causing us to fish further offshore and deeper underwater as more and more fish disappear.
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