If you need help I recommend you type in the specific question you need help with
it can be helpful or harmful
sometimes they are helpful and harmful.
Sandpaper is both helpful and harmful.
Nobelium is a highly radioactive and synthetic element with no known biological role. Due to its short half-life and high radioactivity, it is considered harmful to living organisms and the environment.
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.
they are very harmful.