Energy Powering the Past, Present, and Future - ISBN:0816063540

Energy Powering the Past, Present, and Future

Date: 28 April 2011, 04:52

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The Earth has been blessed with an abundant supply of natural
resources. Natural resources are those elements that exist on
the planet for the use and benefit of all living things. Scientists
commonly divide them down into distinct groups for the purposes of
studying them. These groups include agricultural resources, plants,
animals, energy sources, landscapes, forests, minerals, and water and
atmospheric resources.
One thing we humans have learned is that many of the important
resources we have come to depend on are not renewable. Nonrenewable
means that once a resource is depleted it is gone forever. The fossil
fuel that gasoline is produced from is an example of a nonrenewable
resource. There is only a finite supply, and once it is used up, that is the
end of it.
While living things such as animals are typically considered renewable
resources, meaning they can potentially be replenished, animals
hunted to extinction become nonrenewable resources. As we know
from past evidence, the extinctions of the dinosaurs, the woolly mammoth,
and the saber-toothed
tiger were complete. Sometimes, extinctions
like this may be caused by natural factors, such as climate change

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