Poisonous gases that can harm people and the environment. Some gases have a strong smell, for example sulfur dioxide and methane, while others, such as carbon monoxide, do not have any smell at all.
NOXIOUS GASES

Poisonous gases that can harm people and the environment. Some gases have a strong smell, for example sulfur dioxide and methane, while others, such as carbon monoxide, do not have any smell at all.