EN50291
15 th February 2001, Europe ratified a norm relating to domestic CO alarms (...)
CARBON MONOXIDE
Carbon monoxide is a colourless and odourless gas. Its density is close to that of air. Its presence is due to incomplete combustion of all types of combustibles: wood, Calor® gas, coal, petrol, domestic heating oil, natural gas, petroleum, propane. It rapidly spreads in the environment. It has the same effect as a very toxic asphyxiating gas which is absorbed by the body in a few minutes and then infiltrates the haemoglobin. (...)
RADIOACTIVITY
Matter is made up of atoms. Each atom consists of a nucleus composed of protons and electrons. The nucleus is surrounded by electrons which gravitate around it like satellites. Radioactive materials spontaneously emit Gamma or X rays and/or Beta or perhaps Alpha particle (...)