1. Volcanoes can be helpful because the volcanic soils are the richest and you can earn a farmland.
2. It can bring diamonds from deep under the earth.
3. Lava and tuffs can be use for building.
4. Engineers use steam by rocks of the volcano to make electricity.
Harmful bacteria will harm you. Helpful bacteria will help you.
it is helpful
Two things that are harmful
hahahha
Wind is harmful because it can destroy a building and blow someone away at the right speed. On the other hand, it's helpful as it provides us with a source of energy.
Volcanoes can be usually considered harmful, but in some cases, volcanoes can actually be helpful, so this is a win-win situation. Or a lose-lose. Who knows.
things are harmful to earth
If you need help I recommend you type in the specific question you need help with
Like most things, oil can be either helpful or harmful, depending upon what you do with it.
it can be helpful or harmful
Volcano's can be harmul by destroying lots of things when it errupts:)
sometimes they are helpful and harmful.
Bacteria can be helpful by deleting bad viruses and harmful by killing you
Sandpaper is both helpful and harmful.
The vehicles are helpful because it help in transport the things the vehicles are harmful because it increase the pollution
they are helpful not harmful to plants
helpful