The game is divided into five chapters, each containing several levels.

Although the water contained higher levels of radon, the health risk from radiation was low.

It also means the planet's environment contains high levels of radiation.

This version has time limit of 24 hours, and contains extra levels.

Studies show that fish from the lake contains significant levels of contamination.

Foods contain low levels, and have not been known to cause overdose.

Still, they contain high levels of folate, which is thought to be good for your heart.

Some contain high levels of sugar, while a few are sugar-free.

More than 150,000 children's necklaces have been recalled because they contain high levels of lead, federal officials said.

Hot water is likely to contain higher levels of lead.