Answer:
1.Mercury, Venus, Earth and Mars
2.global warming and climate change; water pollution and ocean acidification; and loss of biodiversity.
3.
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<u>ANSWER </u>–</h3>
Athens and Sparta both used enslaved people, but Athenian men would work with the enslaved people.
In Sparta, there were state-owned slaves called helots. ... In Athens, the lives of slaves were somewhat better. Slaves were privately owned in Athens, and each new slave was welcomed into the family with a ceremony. Slaves in Athens often worked with free citizens, although they were not paid.
<span>Humans have the ingenuity to use/adapt to another resource when another shows signs of depletion</span>
West of the Mississippi River has many more mountains due to more recent orogenic processes. Blackhills, Rocky Mountains, Cascades, Sierras.... List goes on.
Talking, listening, hanging out.
