And lead amounts can be especially high near industrial areas and waste dumps.

VOA: special.2009.06.09

This can lead easily to waste and duplication.

ECONOMIST: Human intelligence

"Weekly bin collections are more expensive to run and lead to less waste being recycled, which is bad news for cash-strapped councils and families and bad news for the environment, " said its waste campaigner, Julian Kirby.

BBC: Weekly bin collections 'still due for return'

While the Environmental Protection Agency would prefer to regulate the byproduct that contains arsenic, mercury and lead under stricter federal hazardous waste laws, the utility sector wants it to remain classified as a solid waste that the states now oversee.

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