If the atmosphere is composed of almost all nitrogen and oxygen, why are we so concerned about the small amounts of
other gasses?
What will be an ideal response?
The atmosphere is about 78 percent nitrogen gas (N2) and about 21 percent oxygen gas (O2). The remaining
1 percent is made up of mostly argon gas (Ar), carbon dioxide (CO2), water vapor (H2O), and ozone (O3). There
are two reasons that the "other gasses" are a concern. First, some gasses can be toxic to living things. Excess ozone
near the surface can harm plants as can gasses like sulfur dioxide. Carbon monoxide is very poisonous to animals,
including humans. The other reason is the greenhouse effect.
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Indicate whether the statement is true or false
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