harmful
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- a causing or capable of causing harm
too much sun is harmful to the skin
harmful effects of smoking
- She has made a mission of promoting the "imperfect white"keeping cotton its natural color, a creamy off-white, instead of using harmful chemical bleaches.
- They are typically made of polyethylene and can take up to 1,000 years to biodegrade in landfills that emit harmful greenhouse gases.
- All this time, it seems, the average Joe may have been ingesting more harmful mercury than he thought.