radon
→
AtLocation
→
soil
|
0.64
|
|
radon
→
AtLocation
→
the earth
|
0.61
|
|
radon
→
AtLocation
→
water
|
0.54
|
|
radon
→
AtLocation
→
rock
|
0.53
|
|
radon
→
AtLocation
→
many regions of the country
|
0.52
|
|
radon
→
AtLocation
→
the ground
|
0.49
|
|
radon
→
AtLocation
→
building
|
0.45
|
|
radon
→
AtLocation
→
outdoor air
|
0.41
|
|
radon
→
AtLocation
→
granite
|
0.40
|
|
radon
→
AtLocation
→
every state
|
0.39
|
|
radon
→
AtLocation
→
elevated levels
|
0.39
|
|
radon
→
AtLocation
→
school
|
0.38
|
|
radon
→
AtLocation
→
small amounts
|
0.37
|
|
radon
→
AtLocation
→
groundwater
|
0.36
|
|
radon
→
AtLocation
→
drinking water
|
0.32
|
|
radon
→
AtLocation
→
some building materials
|
0.31
|
|