The city of Los Angeles released 96 million "shade balls" into the Los Angeles Reservoir. These will serve to shield the water from the sun's heat in order to reduce evaporation and prevent algal and bacterial growth so no toxic substances are produced in the water. The balls reduce evaporation by 85%-90% so will save a lot of water yearly.
Explanation:
<em>The greenhouse effect is a process that occurs when gases in Earth's atmosphere trap the Sun's heat.</em> Gases in the atmosphere such as CO2, water vapor, methane, nitrous oxide, ozone and some artificial chemicals such as chlorofluorocarbons absorb and re-radiate the sun's energy maintaining the Earth's temperature at around 33 degrees Celcius, this happens especially with infrared light that wants to go back to space. This infrared heat spreads back to the land and oceans. This absorption does not happen with visible light, the radiation at 400-800nm easily passes through the atmosphere.
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The correct answer is: A: The first republic to secede from county of Yugoslavia in 1990s was Slovenia. In 25 June of 1991, Slovenia declared independence, and it was internationally recognized as an independent state in 1992 by many European countries. Slovenia and Macedonia separated with out conflicts, but separation of Croatia and Bosnia and Herzegovina resulted in civil war on their territories. Today, there is six sovereign states, which were part of Yugoslavia after the WW II: Serbia, Slovenia, Croatia, Bosnia and Herzegovina, Montenegro and Macedonia.
In 1990 rice production= 350 million tons
In 1999 rice production = 400 million tons
400-350= 50 million ton increase
50/350=.1428 To calculate the percentage increase you divide the total amount increased by the initial amount to determine the percent.
Therefore the world rice production increased by approximately 14% from 1990 to 1999.
