What role can the moon play in providing us with clean energy?

Main Points to Remember

What was once considered 'green' energy just a few decades ago is now an urgent necessity. Our rising energy needs are pushing humanity towards a future of extreme heat, rising oceans, and isolation. Moreover, clean energy is frequently renewable, providing an alternative to the unsustainable, limited sources of power we rely on today.

In summary, the Earth is facing an energy crisis, and some researchers are looking beyond our planet to find a long-term solution. The moon is increasingly seen as a potential source of energy by certain scientists.

The idea of moon energy is not completely new. One current method harnesses the moon's gravitational pull to generate power. Tidal power plants, which function similarly to hydroelectric dams, have been in operation for years. These plants trap water during high tide and release it through turbines during low tide. One such plant, which opened in France in 1966, continues to power hundreds of thousands of homes.

Freestanding "tidal turbines" placed on the ocean floor can also harness the power of tidal undercurrents. These turbines are still in testing phases, but a turbine placed in Norway's Kvalsund Channel began supplying power to 35 homes in 2003. Additionally, plans are underway for a project in New York's East River to power thousands of homes.

However, the concept of using the moon as an energy source takes on a much more futuristic, sci-fi tone beyond that.

The helium-3 concept for clean energy, first proposed in the mid-1980s, remains far from practical use, but its potential is hard to ignore. Proponents claim that the moon's upper crust holds around 1 million metric tons of He3 ions, which could power the U.S. for about a thousand years. All that would be required is nuclear fusion to unlock this energy, according to Energy Bulletin.

Additionally, there's the concept of launching a large-scale mining operation on the moon's surface.

Could this be possible?

The potential is significant. It all begins with a fusion reactor, which, as of now, isn't a workable technology. This reactor would fuse helium-3 ions to create helium-4 (the same substance found on Earth) and energized protons. As noted by Energy Bulletin, this process would produce no greenhouse gases. However, it would generate a substantial amount of energy. According to Artemis, the protons produced by a fusion reactor using the moon's helium-3 could generate ten times more power than the total combustion of all fossil fuels on Earth.

But here's the challenge: helium-3 isn't exactly "available."

There are numerous hurdles in realizing lunar energy. For one, as of 2010, the United States has no plans to return to the moon to set up a permanent colony. This likely delays or even prevents any efforts to start an helium-3 mining operation.

Furthermore, some experts argue that mining helium-3 is a particularly difficult task. Extracting it would require heating the moon's soil to extremely high temperatures, which could make lunar mining prohibitively expensive.

In addition, the reality of a large-scale fusion reactor is still at least fifty years away.

Nevertheless, the idea continues to be considered. Helium-3 could generate more energy, and a more sustainable type of energy, than the sources we rely on today. Moreover, all of this energy would be so clean that energy credits might eventually become obsolete.

At least once helium-3 has replaced rocket fuel, that is.