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srry just trying to get coinns
none really, it isn't really harmful or useful
Rusting is an oxidation reaction.
harmful as it makes the metal brittle
useful photosynthesis cooking food process of digestion harmful pollution rusting taking highly acidic food
useful photosynthesis cooking food process of digestion harmful pollution rusting taking highly acidic food
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
it is harmful because... if thge flies... will...
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.