Harmful.
harmful
Harmful.
for building. It is an extremely useful resource and can be found in abundance in the peak district. It is also used for making other materials. www.wikipedia.com/limestone
in animals -- build bones. It is in many useful building materials. Concrete, limestone in many forms,
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
Most modern bridges are steel structure or framework. Limestone, dolomite and marble have been used in many historic buildings attesting to their durability.
useful
i think its both harmful and useful
it is useful
Ozone at ground level is harmful. It is useful in stratosphere as it protects us from harmful UV rays.