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The Flaw With Fusion

Fusion target implosion on NOVA laser

Fusion power is currently the undisputed ideal form of energy production. It is similar to the current widespread nuclear fission power, but instead of using enriched radioactive fuel, it works by focusing intense energy on a single point, causing several atoms to fuse into a single, larger atom. This is the same kind of energy that powers the sun. The easiest fuels to use are the isotopes of hydrogen: deuterium (²H) and tritium (³H), because they react at the lowest temperatures.

But you didn’t come here for a chemistry lesson. The fact of the matter is that fusion power has been marketed to the public as being able to use water as fuel and produce helium as a byproduct, which is true. But even though this form of production is incredibly efficient, we are still turning water into helium. I know what you’re saying, there’s a LOT of water on this planet, right? How much can we afford to lose? There is only so much water on this planet at one time, and we will never get that water back unless we invest the energy to turn the helium back into water.

These power plants are said to only need to consume one liter of water to produce the power we get from 500 liters of petroleum. But how much water do you think it will take to power the whole planet? In 2008, total worldwide energy consumption occurred at a rate of roughly 15 terawatts (source). If I did my math right, it would take 22,000 lbs. of water to power the Earth for one day on fusion power, that’s over 4 thousand tons per year!

That may not be very much water in relation to the amount on the planet right now, but we’re talking about permanently upsetting the balance. Once fusion power becomes economically and technologically feasible, and energy becomes more cheap and abundant, we will most likely start using more of it. That will result in a decrease in the amount of water in our ecosystem and an increase in the amount of helium.

That being said, fusion power will most likely be able to safely power our planet for at least a few thousand years, probably long enough to find a more reliable energy source, or a more abundant source of nuclear fuel. But people need to know what fusion power is all about before endorsing it. It’s not an end-all solution to the world’s energy problems, nor is it completely safe. It’s not even considered a renewable energy. I think that when fusion power becomes a reality, it should only be used to supplement renewable energy sources, not as the primary energy source. When you break it all down, the only true sources of renewable energy that we know of right now come from the heat of the Earth, or from the sun.

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