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China's water supply has been contaminated by the dumping of toxic human and industrial waste. Pollution-induced algae blooms cause the surface of China's lakes to turn a bright green, but greater problems may lurk beneath the surface; groundwater in 90 percent of China's cities is contaminated.Many times in these cases, the pollution is caused by chemical dumping from nearby factories. Dumping of industrial chemicals, agricultural waste, and urban wastewater has contaminated China's water resources such that over half of all rivers in the country are unsafe for human contact.China's sweeping campaign to cleanse filthy lakes and rivers has improved water quality in some regions — but dirty water still plagues parts of the country. China began tightening environmental rules in 2001, in an effort to cut water pollution emitted by cities, industrial facilities and farms.Dam construction has played significant roles in flood control, irrigation, navigation, and energy supply; however, the enormous negative effects, such as landslides, ecological problems, and water quality decline, could surpass positive gains.
The Mayans used a pyramid and the sun to help them create a calendar.
Responsibility for the holocaust is the difficulty of an ongoing historical debate that has spanned numerous decades. The debate approximately the origins of the holocaust is referred to as functionalism as opposed to intentionalism. Intentionalists which include lucy dawidowicz argue that adolf hitler planned the extermination of the jewish people as early as 1918, and that he personally oversaw its execution. But, functionalists which includes raul hilberg argue that the extermination plans advanced in tiers, due to initiatives by bureaucrats who had been responding to other policy disasters. The debate has settled to a massive diploma as historians have conceded that both positions have merit. The primary obligation for the holocaust rests on hitler and the nazi celebration leadership, but operations to persecute jews, gypsies, and others had been additionally perpetrated by the schutzstaffel (ss), the wehrmacht, regular german citizens as well as by using collaborationist individuals of diverse ecu governments, inclusive of their soldiers and civilians alike. A bunch of things contributed to the surroundings under which atrocities were dedicated across the continent, starting from general racism (such as antisemitism), spiritual hatred, blind obedience, political opportunism, coercion, profiteering, and xenophobia.
