It is both, and both to a very great degree.
Red pands are not useful to mankind
are arthropodes more benificial or harmful to mankind
Fire can be useful in the melting of metals to mold them into new products. Fire can also be useful in cooking as it kills harmful bacteria. If properly controlled, it can also be used in preventing other fires from starting randomly.
lion are useful and harmful
It is not harmful. Also it is not useful
The changes talking place in our surroundings and which are useful to us are called Useful changes. The changes which are not useful but harmful are called Harmful changes
giraffes useful to mankind ?
useful
i think its both harmful and useful
It was used for fishing
Ozone at ground level is harmful. It is useful in stratosphere as it protects us from harmful UV rays.
It is useful because we can breathe it.