The report from the WHOs International Agency for Research on Cancer said there was enough evidence to rank processed meats as group 1 carcinogens because of a causal link with bowel cancer
Bush, T
And that's just cardiovascular effects -- other researchers are still exploring the relationship between marijuana smoke and long-term cancer risk
Birds might be at a greater risk because their small size and fast metabolism means they absorb nicotine and other chemicals faster, requiring less toxins to cause harm

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