Mount McKinley is the tallest US mountain and Mount Everest is the tallest southwest asian mountain, therefore the tallest mountains in southwest asia are taller than the tallest mountains in the US
Fossil fuels, they are natural fuels (because they are made of living organisms)
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There are many ways that classes of people differentiate themselves from others, but one of the most common ways is by race and/or community where there is a plurality of people. Those may be rather stereotypical pictures, but you get the idea. Diversity is awesome. One lifespan isn't enough to discover all the many forms human beings are and why.