A student was studying the changes in carbon dioxide levels over time, as shown in the readings at Mauna Loa atmospheric station in Hawaii. In trying to reduce levels of carbon dioxide, the student wants to design and implement solutions to accomplish this
goal. Which of these solutions could potentially lower carbon dioxide and greenhouse gas emissions if implemented? Select all
that apply.
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Tools
A)
The student could use biomass to heat the home rather than a furnace.
B)
The student could walk to locations rather than use a car to reduce carbon
dioxide emissions.
The student could promote the use of solar panels in her home and
neighborhood for electricity generation.
The student could promote the use of hybrid vehicles rather than
traditional fuel combustion engine vehicles.
D)
E)
The student could increase meat consumption rather than vegetable and
grain consumption to reduce carbon dioxide emissions.

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).