According to the EPA, the average indoor radon level is about 1.3 picocuries per liter (pCi/L). People should take action to lower radon levels in the home if the level is 4.0 pCi/L or higher. The EPA estimates that nearly 1 out of every 15 homes in the United States has elevated radon levels.Outdoors, radon generally disperses and does not reach high levels.adon is a colorless, odorless, radioactive gas. It forms naturally from the decay (breaking down) of radioactive elements, such as uranium, which are found in different amounts in soil and rock throughout the world.
Download. The Strait of Malacca as one of the most important geopolitical regions for the Peopleâs Republic of China. By: Guillermo Pineda The geographical hotspots of the world are all related to economic trade and global exchange of political interests. Places such as the Panama and Suez Canals have always been in the Western media.
The modern history of Singapore began in 1819 when Englishman Sir Stamford Raffles established a British port on the island.Under British colonial rule, Singapore grew in importance as a centre for both the India-China trade and the entrepot entrepÃ´t trade In Southeast, asia rapidly becoming a major port. cityater, the Kingdom of Singapura rose in importance during the 14th century under the rule of Sultan Iskandar Shah and Singapore became an important port, until it was invaded by the Majapahit in 1398. It then came under the Malacca Sultanate, before finally destroyed for good by the Portuguese.