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The story

Year Three Day 61 Obama Administration March 21, 2011 - History

9:15AM THE FIRST FAMILY departs Rio de Janeiro, Brazil en route Santiago, Chile Galeao Air Force Base, Rio de Janeiro, BrazilCT 1:20PM THE FIRST FAMILY arrives in Santiago, Chile Santiago International Airport, Santiago, Chile1:50PM THE PRESIDENT and THE FIRST LADY participate in an arrival ceremony La Moneda Palace, Santiago, Chile2:00PM THE PRESIDENT and President Sebastian Piñera of Chile take official photo La Moneda Palace 2:05PM THE PRESIDENT holds a bilateral meeting with President Piñera La Moneda Palace2:25PM THE PRESIDENT holds an expanded bilateral meeting with President Piñera La Moneda Palace3:05PM THE PRESIDENT and President Piñera hold a joint press conference La Moneda Palace4:20PM THE PRESIDENT delivers a speech Centro Cultural Palacio La Moneda 5:30PM THE PRESIDENT and THE FIRST LADY attend U.
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Geography

World environmental issues

The exact amount of water on the planet is 1,332 cubic kilometers, according to the US Geological Survey Institute. About 72% of our planet is covered by water, but 97.5% of all this water is salty, coming from the seas and oceans - water that is not potable. Not all freshwater on the planet is available for human consumption. The oceans have a 24,000-kilometer layer around the Earth, with an average depth of 3.2 kilometers.
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Geography

Greenhouse Effect (continued)

The first warning about the depletion of the ozone layer was given by NASA, from studies done between 1979 and 1986: the shield has been losing thickness and has a hole of 31 million square kilometers over Antarctica, equivalent to 15% of the area. terrestrial surface. In February 1992, NASA identifies a second hole, this time over the North Pole reaching regions near the Arctic Circle.
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The story

Hoover Dam

In the early 20th century, the U.S. Bureau of Reclamation devised plans for a massive dam on the Arizona-Nevada border to tame the Colorado River and provide water and hydroelectric power for the developing Southwest. Construction within the strict timeframe proved an immense challenge, as the crew bored into carbon monoxide-choked tunnels and dangled from heights of 800 feet to clear canyon walls.
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The story

Origins of humanity, Creationism

You must have been curious about how the human species came about on the planet we live on, right? This curiosity is not yours alone. Many researchers and scientists have been studying to find out how the origin of the human being on Earth came about. The more science develops, the more advanced the scientific resources these researchers can utilize.
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