What is the surplus of food in Mesopotamia that led to the growth of cities? weight problems for the people of Mesopotamia conflict because everyone wanted more Edit
Cosmic radiation permeates all of space, the source being primarily outside of our solar system. The radiation is in many forms, from high speed heavy particles to high energy photons and muons. The upper atmosphere interacts with many of the cosmic radiations, and produces radioactive nuclides.They can have long half-lives, but the majority have shorter half-lives than the primordial nuclides.ome of the major streets of the surrounding cites have radiation levels as high as 0.13 mrad/hr (1.3 Gy/hr), which is more than 10 times the normal background. Another high background area in Brazil is the result of large rare earth ore deposits that form a hill that rises about 250 meters above the surrounding area.
There are three groupings of naturally occurring radiation, mostly based on where the radiation comes from. First there is the radiation in the soils and rocks, called primordial or terrestrial. Then there is radiation that comes from space, called cosmic or cosmogenic.aturally occurring radiation can be found all around us. Radiation can be found in soils, in our air and water, and in us. Because it occurs in our natural environment, we encounter it every day through the food we eat, the water we drink, and the air we breathe.