A tree planted too close to your house may fall onto the roof in a storm. A fallen tree can block traffic. A tree in a drought can be ignited easily and cause a forest fire that destroys many homes. Fallen leaves on a lawn need raking during Fall. Fallen leaves get caught in a gutter may cause problem during snow melt. A tree, dead or alive, is very expensive to be removed by a professional. Other than these human-induced scenarios, the trees are very beneficial.
pencils are harmful to trees because they use a big amount of their bark
No
Yes! Are you guys stupid or something! They are harmful to trees
Not unless it falls on them.
harmful to animals because their are no trees that serve as habitat to animals and source of their foods
Yes you tree killer
There are harmful to all organisms, but some bacteria are helpful in many ways.
because they spoil food
it can put a virus in your computer
They can cause infextions and diseases
They can Bite, scratch, sting you also here are some insects taht are harmful Ex. Onespotted stink bugs, Thrips, Misquitos, Aphids, and sawflies. P.S. Spiders are not insects they are Arachnids.
ways of reducing intake of harmful substances