Answers

2016-02-27T15:18:24+05:30
Accumulation of harmful chemicals can not be avoided but it can be reduced. it can be reduced by reducing the levels in the food chain.. for eg in a food chain like... plants-goat-humans..humans are at higher level so accumulation of chemicals will be more.. but if the food chain is like this... planrs-humans... here humans will have less accumulation of chemicals in their body.
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