The Brainliest Answer!
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Hey there! 

1. The following things we do are helpful for Earth: 
- Picking up garbage
- Watering plants and trees
- Recycling objects

2. The following things we do are harmful for Earth: 
- Throwing trash on the ground
- Hurting trees

Thank you!
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Dangerous: Through litter everywhere.
Helpful: We get several thing as oxygen, food, water etc...

I hope this was helpful to you...

Thanks for letting me answer this thinking question :)
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