Are things like solar, you know, a familiar
cassip characters, wind, hydro, biomass, maybe some less familiar.
Forms we can harness energy out of
wave activity and tidal activity, and then geothermal is actually reasonably common.
But these are kind of a.
Some familiar forms of renewable energy.
We might think of a few of these as actually the most traditional forms of
energy at least when considering in the
context of the broader sweep of human history.
For example, our earliest.
Harnessing of energy lets say beyond that we acquire in food calories would
of come from the thermal energy we took out of biomass by burning it.
And then course prior to widespread industrialization, we were making
use of wind and hydro power to do mechanical work.
So in some sense even though renewables are seen as a somewhat of a.
A new thing in developed economies they
are really very traditional sources of energy.
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The other principle group of energy resources, are
these non-renewable, or mineral based forms of energy.
So, these include.
Though the obvious fossil fuels, coal, gas, natural gas, and then
something called gas hydrate which may not be used extensively in practice.
They are essentially crystals of ice and
natural gas found in marine environments, so.
They may not be used in practice, but
they do represent a large potential energy source.
And then the other primary non-renewable or mineral-based form is nuclear power.
Nuclear energy, in practice, uses uranium as a fuel and
refers to the energy release through the process of nuclear fission.
With a particular amount of, of the good.
This is because of different primary energy
sources produce goods with different energy densities.
For example, this slide displays energy per unit volume or relative to gasoline.