Ozone at ground level is harmful. It is useful in stratosphere as it protects us from harmful UV rays.
Antarctica is a continent dedicated to science and it is where scientists study the health of planet earth. What's in Antarctica is data, and this is what is useful for every human.
because a vinegar is not harmful to human while a hydrohcloric acid is harmful
Chemists see whether chemicals are harmless, harmful, lethal, or what they are useful for.
some harmful radiations reach to earth and can damage skin of human beings and plants
Generally indigestion tablets are not harmful but useful. But excess of use or some other health problems of some individuals can lead to harmful effects. See the link below.
There are no permanent human residents on Antarctica.
There really are no human activities that don't affect Antarctica.
The weight of bacteria in human body is estimated to be 1 to 2 percent of the entire body mass. Bacteria is useful and can be harmful to the body.
microorganisms can be harmful and useful! Yeast is a microorganism and is used in bread. but some bacteria (microorganism) can be harmful, they can make you ill or kill you. but in our imune system there are antibacteria fighting off disease and protecting us. So microorganisms can be harmful and beneficial
"Pradushan" means pollution in English. It refers to the presence of harmful or toxic substances in the environment that can be detrimental to human health, ecosystems, and the planet as a whole.
There is no native human life there.