.pld Extension - List of programs that can open .pld files In the following table, you can find a list of programs that can open files with .pld extension.This list is created by collecting extension information reported by users through the 'send report' option of FileTypesMan utility.
According to a national residential radon survey completed in 1991, the average indoor radon level in the United States is 1.3 picocuries per liter (pCi/L). The average outdoor level is about 0.4 pCi/L. Excessive radon levels have been found in all of the 50 states.
These 10 animal facts will amaze you. Radon is a colorless, odorless gas that is naturally present in the ground. Homes in areas with large deposits of radon underground can have higher levels of the gas, especially in basement areas where walls are underground.hile any amount of exposure to radon gas is potentially unsafe, the United States Environmental Protection Agency (EPA) recommends that homeowners install a radon mitigation system if levels are 4 picocuries per liter (pCi/L) or higher. Over time, exposure to a high radon level may cause lung cancer.