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Which of these puts the least emission into the air? (a)Oil (b)Coal (c)Natural Gas (d)Uranium

Answer 1

Naomi Aronson

(d) Uranium

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Answer 2

Mateo Aguilar

Well, I would argue that the fuel with LEAST emissions is uranium......#(d)#....

Uranium relies on a #"nucular process"# to provide energy; of course, the extraction and processing of uranium ores constitutes some (not inconsiderable) carbon footprint.

By chemical means, all fossil fuels produce carbon dioxide, a greenhouse gas, and some sulfur and nitrogen oxides are also produced by lower grade coal ores:

#C(s) + O_2(g) rarr CO_2(g) + Delta#

#C_nH_(2n+2)(l) + (3n+1)/2O_2(g)rarrnCO_2(g) +(n+1)H_2O(l)+Delta#

Sulfur and nitrogen oxides are also produced as a result of sulfur and nitrogen contaminants in the coal ores.

Methane, or natural gas, is by far the cleanest fossil fuel available.

#CH_4+2O_2(g) rarr CO_2(g) + 2H_2O(l) + Delta#

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.