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In the United States, the EPA and the United States Geological Survey (USGS) are the principal federal agencies working with the CEC to define and map ecoregions. Ecoregions may be identified by similarities in geology , physiography , vegetation , climate , soils , land use , wildlife distributions, and hydrology .
The United States Environmental Protection Agency (EPA) says that radon is the number one cause of lung cancer among non-smokers. [94] The general population is exposed to small amounts of polonium as a radon daughter in indoor air; the isotopes 214 Po and 218 Po are thought to cause the majority [ 95 ] of the estimated 15,000–22,000 lung ...
Radon, a byproduct of naturally decaying uranium, is estimated to cause thousands of deaths each year nationwide. Here's how to protect yourself.
The United States Environmental Protection Agency recommends action for any house with a concentration higher than 148 Bq/m 3 (given as 4 pCi/L). Nearly one in 15 homes in the U.S. has a high level of indoor radon according to their statistics. The U.S. Surgeon General and EPA recommend all homes be tested for radon.
Radon mitigation is any process used to reduce radon gas concentrations in the breathing zones of occupied buildings, or radon from water supplies. Radon is a significant contributor to environmental radioactivity and indoor air pollution. Exposure to radon can cause serious health problems such as lung cancer. [1]
Likewise, the saturated zone of a soil frequently has a higher radon content than the unsaturated zone because of diffusional losses to the atmosphere. [84] In 1971, Apollo 15 passed 110 km (68 mi) above the Aristarchus plateau on the Moon, and detected a significant rise in alpha particles thought to be caused by the decay of 222 Rn.
File:Blank_US_Map.svg licensed with Cc-by-sa-3.0-migrated, GFDL 2009-11-05T19:44:02Z NuclearVacuum 959x593 (91518 Bytes) minor fix from previous upload 2009-11-05T19:39:42Z NuclearVacuum 959x593 (88399 Bytes) Fixed up the borders so they are connected with each state and loosing that gap between them.
The Iowa Radon Lung Cancer Study, which was overseen by Field, is widely considered the most comprehensive residential radon study ever performed. The study [ 3 ] found a 50% increased lung cancer risk at the EPA's radon action level of 4 pCi/L. Field is considered one of the leading advocates in the world for the reduction of radon exposure in ...