Solids, I say lead is pretty harmful. So is Uranium (whether it's liquid or solid).
Liquids, I pretty sure Mercury is one of the worst, if you touch it, it disolves into your skin. (Which is bad) Gasoline is also pretty bad along with oil.
Gases, I say Methane (A big cause in global warming), and Helium if you breathe too much, and Radium (Radiation), as well as flammable hydrogen.
yes no your nose protects your lungs from harmful gases
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solid
Because it might contain certain harmful gases such as Carbon dioxide, methane, and so on which are harmful to lungs.
There are no harmful gases in space. There are no gases. Space is a vacuum. Astronauts wear a pressure suit so that they are not exposed to the vacuum, which could kill them.
Harmful gases released from factories are commonly referred to as air pollutants. They can include greenhouse gases like carbon dioxide and methane, as well as toxic pollutants such as sulfur dioxide and nitrogen oxides. These gases can have adverse effects on both human health and the environment.
Air Pollution Beer Oxegyn
the gases are converted to less harmful gases as nox to no2
By Throwing Garbages and Harmful Gases and Harmful Chemicals and last FERTILIZERS!
It's called Melting.
Shampoo is a liquid.
Some harmful gases include carbon monoxide, sulfur dioxide, nitrogen oxides, and volatile organic compounds. These gases can cause respiratory issues, environmental damage, and contribute to climate change.