Why radioactive pollutants are very dangerous?

Radioactive pollutants are very dangerous because of the following reasons-

1. Radioactive wastes from atomic reactors are hazardous to living organisms.
2. Even if radioactive wastes are buried underground, they may escape into the surroundings.
3. Inert gases escape as vapours and pollute the environment.
4. The radioactive wastes emitted during the testing of nuclear weapons makes the surrounding materials radioactive.
5. Radioactive materials are carried away to distant places by winds. They are brought down by rain. Raindrops containing these radioactive particles fall on earth,and affect the soil causing soil pollution.
6. The radioactive materials in the soil reach water sources, where the aquatic organisms absorb and accumulate them through the food chains and pass them on to human beings.