No, Cobalamin (B12) is a vitamin necessary to the human body.
microsporium is a terrible fungi that is harmful to human beings
No.
Visible light and infrared radiation are two types of solar radiation that are not harmful to human beings. They are part of the electromagnetic spectrum and are essential for processes such as photosynthesis and vision.
some harmful radiations reach to earth and can damage skin of human beings and plants
mice can sometimes spread diseases that can kill numorus numbers of human beings and such.
Ozone layer is very important for human beings. It protects us from the harmful UV radiations of the sun.
Plutonium-239 is a radioactive particle that is harmful to human beings due to its high toxicity and ability to emit high-energy alpha particles, which can damage cells and cause long-term health effects such as cancer and organ failure if ingested or inhaled.
polluted water is harmful for animals and human beings who drink water from well.it is also harmfull for plants which are getting water from pollted groundwater.
Ozone depletion protects us from UV rays. These rays are harmful for human beings.
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.
they are not harmful to the environment