Let's deal with the first one Carbon Monoxide.
Carbon Monoxide is a highly poisonous gas, not only can it cause death but also serious long term health problems such as brain damage.
Carbon Monoxide is produced by the incomplete burning of fuel. This can happen when a gas appliance has been incorrectly fitted, badly repaired or poorly maintained. It can also occur if flues, chimneys or vents are blocked.
Oil and solid fuels such as coal, wood, petrol and oil can also produce Carbon Monoxide.
Poisoning occurs when you breathe in the gas and it replaces oxygen in your bloodstream, without oxygen your body tissue and cells die.
So it really is very simple - Buy a Carbon Monoxide Detector and fit it - NOW
Now the other type of silent killer is an Assassin.
Generally they are unassuming, you would not be able to spot one if they came up and poked you in the eye. They blend in, act regular, giving nothing away.
There methods of putting you to sleep vary, but the one thing that is common is you will never know anything about it.
An Assassin, may have a very ordinary job, such as driving a bus, he may not look like the films portray these days, always dressed in black and hanging out in seedy pubs hiding behind a paper. No, he could be the fat jolly fellow with a beard who said good morning to you today!
So be aware, just like Carbon Monoxide they are just as deadly, give no warnings and leave no sign of a struggle.
My best advice would be to stay clear of fat men with beards and buy a detector like the one above.
You have been warned!