they arn't
Carbon monoxide, nitrogen oxides, particulate matter, and sulfur dioxide are harmful substances that can be produced when fuels burn. They contribute to air pollution and have negative impacts on human health and the environment.
I think the department of health and human services.
Department of Health, Education and Welfare
One harmful algae is Karenia brevis, which is known for causing red tide events in coastal waters. This dinoflagellate produces toxins that can harm marine life and affect human health through contaminated seafood or respiratory irritation from aerosolized toxins. Other harmful algae include Alexandrium species, which can cause paralytic shellfish poisoning.
The sound level that is harmful to health is called "noise pollution" or "excessive noise levels." Prolonged exposure to high levels of noise can lead to hearing damage, stress, sleep disturbances, and other health issues.
Another name for contamination is pollution. Pollution refers to the presence of harmful or unwanted substances in the environment, typically caused by human activities.
Tetraethyllead, Pb(C2H5)4, is an example of an organometallic compound that is not found in nature. It was widely used as an anti-knock additive in gasoline but has been mostly phased out due to its harmful effects on the environment and human health.
The pollutants produced by burning coal are Mercury-HG Sulphur oxide-SO2 Nitrogen oxides-NO2
No, health is a common, abstract noun. Health is only a proper noun when used as part of a proper name or a title such as the Occupational Safety and Health Administration or Kathleen Sebelius, Secretary, US Dept. of Health and Human Services.
The most common name for harmful microbes is germs.
Any virus is harmful. Your question should be "Is (insert name of virus here) harmful?"
America's health care administration is the United States Department of Health and Human Services. They are involved in getting health care, finding jobs and child care, treating diseases, and regulating food safety.