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And then again it could be from natural oils exuded from hundreds of millions of non-native fir trees grown by New Zealand's lucrative timber industry, and their effects on the lungs of aboriginal populations. The statisticians who trumpet this stuff should be very careful about drawing causal relationships because it's a double-edged sword.

[A CA Guy]

The study seemed to have isolated this issue to the cannabis, so there is no grounds here for that speculation.

Could be in places where the ground has poisons there could be arsenic of other transfers that kill people as well, but this seems specific to lung cancer.