Second Lutenat
media is very useful
Its Adrian Dias
Ozone can not only be said harmful but useful too. It acts as a pollutant at the ground level.
Clamidamonas are photosynthetic creatures.They are not harmful.
The Antarctic ozone hole is not useful. It was harmful.
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
media is very useful
Ozone at ground level is harmful. It is useful in stratosphere as it protects us from harmful UV rays.
tintre
A bee is both harmful and useful
lion are useful and harmful
It is not harmful. Also it is not useful
It is both because it helps us to breath but it can also stop us from breathing.
Its Adrian Dias
Yes. Most microorganisms are useful, a few are harmful to us, plants, or other creatures.
useful
i think its both harmful and useful