DSST Environment-Humanities DANTES II

Know what the current of world population growth is 1

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Know what the current % of world population growth is. 1% (1.14% to be exact.) Population - Death Rate/Birth Rate (Know the birth rate is increasing when compared to the death rate) Death Rate – 8.37% Birth Rate – 19% to 20% Which global region's population is increasing more than the others. Western Asia (If not there pick Africa) Be familiar with the causes and effects of infant mortality in developing nations Poverty (Answer to the question) Know the difference between strip cropping (or farming) and contour cropping (or farming). Strip farming is a method of farming used when a slope is too steep or too long, or when other types of farming may not prevent soil erosion. Strip farming alternates strips of closely sown crops such as hay, wheat, or other small grains with strips of row crops, such as corn, soybeans, cotton, or sugar beets. It is also known as strip cropping. Strip farming helps to stop soil erosion by creating natural dams for water, helping to preserve the strength of the soil. Contour farming is the farming practice of plowing across a slope following its elevation contour lines. The rows formed slows water run-off during rainstorms to prevent soil erosion and allows the water time to settle into the soil. In contour plowing, the ruts made by the plough run perpendicular rather than parallel to slopes, generally resulting in furrows that curve around the land and are level. Know what acid rain is. Acid rain is rain or any other form of precipitation that is unusually acidic, i.e. elevated levels of hydrogen ions (low pH). Acid rain is caused by emissions of compounds of ammonium, carbon, nitrogen, and sulfur which react with the water molecules in the atmosphere to produce acids.
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Waste management (what comprises the greatest contributor to landfills...yard waste, paper, plastic, or sewage?). The answer is Paper. Know what an electrostatic precipitator is. Know wet scrubbers and electrostatic treatment of coal burning plants. (How should we treat stackable pollution issues? – use the technologies below) An electrostatic precipitator (ESP), or electrostatic air cleaner is a particulate collection device that removes particles from a flowing gas (such as air) using the force of an induced electrostatic charge. Electrostatic precipitators are highly efficient filtration devices that minimally impede the flow of gases through the device, and can easily remove fine particulate matter such as dust and smoke from the air stream. Wet Scrubber is a form of pollution control technology. The term describes a variety of devices that remove pollutants from a furnace flue gas or from other gas streams. In a wet scrubber, the polluted gas stream is brought into contact with the scrubbing liquid, by spraying it with the liquid, by forcing it through a pool of liquid, or by some other contact method, so as to remove the pollutants.
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