Harmful since it drives up prices.
If you need help I recommend you type in the specific question you need help with
The biggest defender of the American freedom from harmful monopolies is the operation of the free market itself.
it can be helpful or harmful
sometimes they are helpful and harmful.
Sandpaper is both helpful and harmful.
they are helpful not harmful to plants
helpful
helpful
Depends on what part of "harmful" or "helpful" you are referring to.
Harmful bacteria will harm you. Helpful bacteria will help you.
Slash and burn does not sound helpful, it sounds harmful.
helpful