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hydropower, others are looking ahead to even cleaner and more efficient
alternatives. Here are the ones that hold a great deal of potential.

Idea I

55-60 % of all incoming solar energy does not make it through the Earth’s
atmosphere. In a space-based solar power system, fleets of satellites with
large reflectors or inflatable mirrors could be spread out in space, directing
solar radiation onto solar panels. The panels could convert that solar power
into microwaves that continuously beam down to power-receiving stations
on Earth, ensuring no energy is lost.

Status

In March 2015, the Japan Aerospace
Exploration Agency (JAXA) revealed they
had successfully converted 1.8 kilowatts
of electricity into microwaves, after which
they wirelessly beamed them a distance of 50
metres, providing the idea’s viability.

Idea II

Many experts believe the simplest way of
generating renewable energy is through our own
bodies. Devices now use much less power than
before. Harvesting just a microwatt of electricity
would be enough to power many small electronic
devices. To harness the energy we generate
through our own movement, we would simply need to wear a system that collects
and converts it.

Status

UK researchers have developed a knee brace that collects electrons while you walk.
As the wearer’s knee bends, four metal vanes in the device vibrate like a guitar
string and produce electricity.

Idea III

Wave energy is technically a form of stored wind energy, since waves are
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