If you add the valences of each atom in the molecular formula for arsenious acid, H 3 AsO 3, you can see that the molecule, which is uncharged, has a total valence state of 0 (3x(+1) for the hydrogen atoms; 1x(+3) for the arsenic(III) atom; 3x(-2) for the oxygen atoms = 3+3-6 = 0).
Eighty percent of sewage in India is untreated and flows directly into the nation's rivers, polluting the main sources of drinking water, a study by an environment watchdog showed Tuesday.
Fact 40: Cruise ships are also a major source of water pollution. They produce over 200,000 gallons of sewage which is mostly released in the ocean. Apart form that, they are also causing at least 35,000 gallons of water contamination due to oil spill.act 6: 20% of the groundwater in China is used as drinking water which is highly contaminated with carcinogenic chemicals which cause high levels of water pollution. Fact 7: Fourteen billion pounds of garbage mostly plastic, is dumped into the ocean every year.