Yes, because of giant tv sets, computers, personal electronic devicies, cell phones, and other machines that more people have today than there available 20 years ago; More people use more energy today, than they did 20 years ago.
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well barely know one know exept for dead people who lived a billon years ago
100 years ago is 1909, therefore it is the 20th century.
Egyptians people who invented the Multiplication.Babylonians thousands of years ago.
people hundreds years ago used pencil and paper to measure
49 years ago (as of 2017 !)