A renewable source is one that can be renewed.
Some examples are solar energy, biomass and wave energy
Culminated with the trial and condemnation of Galileo Galilei by the Roman Catholic Inquisition in 1633. Galileo was prosecuted for his support of heliocentrism, the astronomical model in which the Earth and planets revolve around the Sun at the centre of the Solar System.
One of the main reasons why secretary of state william seward purchased alaska is because he believed it to be wildly undervalued at the time, which turned out to be correct, even though it took a while to convince others that this was a good idea.
