The radon is formed by radioactive decay from the small amounts of uranium that can be found naturally in all rocks and soils.

It is colourless, odourless and tasteless but it is found everywhere.

The UK Government, however, states that "every building contains radon but the levels are usually low."

And that "the chances of a higher level depend on the type of ground."

The radiation emitted from the elements can increase the risk of cancer.

The UK Government has released a map showing where high levels are more likely.

The darker the colour, the greater the chance of a higher level. The chance is less than one home in a hundred in the white areas and greater than one in three in the darkest areas.

Here are the worst affected areas in Glasgow

The map reveals that areas in Glasgow's city centre and west end have been identified as hotspots, stretching across most of the area along the River Clyde.

Similarly, hotspots have been identified in and around Drumchapel, with areas in Maryhill also affected.

In the South Side, a host of areas have been pinpointed near to Pollok Country Park and Queen's Park.

What is radon gas?

Radon is a naturally-occurring radioactive gas that we can't see, smell or taste it.

The gas is formed is formed by the radioactive decay of the small amounts of uranium that occur naturally in from rocks and soil.

Why is it a risk to our health?

As radioactive elements decay they emit radiation. Expose to this is a risk to our health as the radiation can cause damage in living tissues and increase the risk of cancer in humans.

Where is it found?

Radon is found everywhere due it being formed from the uranium in all rocks and soils.

Why is radiation harmful?

We are all exposed to radiation from natural and man-made sources but the radioactive elements formed by the decay of radon can be inhaled and enter our lungs.

Once inside our the lungs, these elements continue to decay and emit radiation and are then absorbed by the nearby lung tissues and cause localised damage.

Studies have shown that increased exposure to radon increases your risk of lung cancer.