Floods distribute and deposit river sediments over large areas of land. These river sediments replenish nutrients in topsoil and make agricultural lands more fertile. The populations of many ancient civilizations concentrated along the floodplains of rivers such as the Nile, the Tigris and the Yellow because periodic flooding resulted in fertile, productive farmland. The construction of the Aswan High Dam in Egypt prevented the Nile from flooding major population centers downriver, but it also depleted once fertile agricultural lands along the banks of the river.
The most comprehensive and authoritative evaluation on the safety of milk thistle extract was conducted by the National Toxicology Program of the United States Department of Health and Human Services. This study administered milk thistle extracts at varying dosages to different strains of mice and rats for periods up to two years, the human equivalent of lifelong exposure. The dosages used are simply not possible to achieve in humans taking milk thistle extract (., female rates were given a daily dose of 2,750 mg of milk thistle extract per pounds body weight). It would be like a woman taking 192,500 mg of milk thistle extract each day instead of the recommended 150 to 300 mg.
Mobile phone has become necessity of every human being. One can’t imagine the life without it. Being a part of today’s technological world, chances are quite high that you also own a mobile phone. Just like everything, mobile phones have both positive and negative effects. Have you ever taken time to think about those effects? Not? No problem! Do think about it now! By the way, you don’t need to think or research about it yourself, as I have done that for you. Do read out the following section to know about positive and negative effects of mobile phones.