Circle correct choice: 1. Change in agricultural productivity from climate change in the 2003 -2080 time period is projected to be most dramatic in (A) Russia and northern China (B) India and northwest Australia 2. As temperatures rise, a decline in water availability will have a larger effect on (A) india (B) Midwestern part of U.S.A. 3. The leading source of water pollution that contaminates U.S. rivers comes from (A) coal mining tailings (B) agricultural runoff. 4. An increased global demand of $$ 50 \% $$ for (A) energy and food (B) energy and water by the year 2030 for 8.5 billion people is a pretty alarming statistic. 5. Domestic water use withdrawal and consumption will continue to be at a (A) higher (B) lower rate than industrial water use.

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1. The most dramatic change in agricultural productivity over the 2003–2080 period is projected for regions with emerging challenges from climate change. Many studies indicate that high‐latitude areas, such as Russia and northern China, will experience significant shifts (both positive and negative) as climate zones shift. Thus, the answer is  
  $$ 	extbf{(A) Russia and northern China} $$.

2. As temperatures rise, regions that already face water stress are likely to be affected more severely. India, with its high population density and variable water resources, is particularly vulnerable to reductions in water availability compared to areas like the Midwestern U.S. Hence, the answer is  
  $$ 	extbf{(A) India} $$.

3. The leading source of water pollution in U.S. rivers is largely due to non-point sources rather than point sources. Agricultural runoff, which carries fertilizers, pesticides, and sediments, is widely recognized as the main contributor to water quality problems in many U.S. waterways. Therefore, the answer is  
  $$ 	extbf{(B) agricultural runoff} $$.

4. Projections show that, by 2030 and for a world of 8.5 billion people, global demand will increase substantially. While both food and water demands are critical, alarming statistics often focus on the projected $$50\%$$ increase in the demand for energy and water. The stress on water supply in particular is a major concern in various regions. Thus, the answer is  
  $$ 	extbf{(B) energy and water} $$.

5. In many regions, domestic water withdrawals and consumption are significantly lower than those for industrial applications (which include agriculture, manufacturing, and energy production). This trend is expected to continue. Consequently, the answer is  
  $$ 	extbf{(B) lower} $$.
1. **A** 2. **A** 3. **B** 4. **B** 5. **B**

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