How Long Do the Acid Generating Gases from Fossil Fuel

question 4

Multiple Choice

How long do the acid generating gases from fossil fuel combustion remain in the lower levels of the atmosphere and how far do they travel?

• A) weeks to months; only locally
• B) less than a few hours; a few kilometres
• C) several years; around the world
• D) a few hours to a few days; up to several thousand kilometres

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Definitions:

Substrate

The surface or material on or from which an organism lives, grows, or obtains its nourishment, or the reactant upon which an enzyme acts.

RNA Hypothesis

A scientific theory suggesting that RNA, rather than DNA, was the first genetic material to evolve in early life forms.

Polypeptides

Chains of amino acids linked by peptide bonds, which can function independently or as part of a protein.

Alexander Cairns-Smith

A scientist known for his "clay hypothesis" proposing that complex organic molecules could have evolved from clay minerals.