Using the Internet, examine the eff ect on our world food supply of using a large percentage of the U.S. corn crop for the production of ethanol.
What will be an ideal response?
Approximately 30 percent of the U.S. production of corn is anticipated to be used for
the production of ethanol in 2012. At the same time, the worldwide demand for corn is
expected to grow to 793 tons in 2009. This growth in demand is causing food prices to
rise throughout the world. A fear exists that the use of corn for ethanol production will
have an impact on the worldwide price and availability of corn. Farmers are saying
that is not the case, and they will grow more corn to meet the demand. Economists
are not so sure, and they say a risk exists that food prices could rise in the third world
to the point where starvation is inevitable.
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More than half of Canadian electric power is produced from ___________________ at present.
Fill in the blank(s) with the appropriate word(s).
____________________ allows the water to move slowly down into the soil to prevent erosion or puddling
Fill in the blank(s) with correct word
Which of the following means of estimating soil water levels gives a direct measurement of the water content?
A) gravimetric determinations B) pressure membrane C) gypsum blocks D) tensiometer E) neutron scattering
The piston drives the rotating crankshaft by transferring force to the ________
A) Push rod B) Valve head C) Connecting rod D) Camshaft