The Shimizu Corporation wants to, essentially, build a ring of solar panels around the moon's equator and transmitted back to the Earth via microwave. And they want to get the project, dubbed LUNA RING, started by 2035.

A shift from economical use of limited resources to the unlimited use of clean energy is the ultimate dream of all mankind.
The LUNA RING, our lunar solar power generation concept, translates this dream into reality through ingenious ideas coupled with advanced space technologies.
Virtually inexhaustible, nonpolluting solar energy is the ultimate source of green energy that brings prosperity to nature as well as our lives.
Shimizu Corporation proposes The LUNA RING for the infinite coexistence of mankind and the Earth.

Helium-3 is slightly different than the gas that fills birthday balloons. Rather, Helium-3 is a stable isotope of helium that is missing a neutron, with this missing neutron allowing for the production of clean energy. The moon holds a tremendous supply of Helium-3 on its surface, but will Helium-3 really be the answer to our energy problems on Earth?

In the upcoming years the electrical energy will
be the main source for world’s growth. We all
know that the consumption of electrical energy
is increasing whereas the resources are
depleting. Terrestrial renewable systems
(hydroelectric, geothermal, ocean thermal,
waves, and tides) cannot dependably provide
adequate power. However expanding nuclear
fission power would require breeder reactors,
but there is intense political resistance to that
idea because of concerns about proliferation,
nuclear contamination of the environment, and
cost So we have to switch over to renewable
energy resources. Over the 21-st century, a
global stand -alone system for renewable power
would cost thousands of trillions of dollars to
build and maintain. Energy costs could consume
most of the world's wealth. We need a power
system that is independent of earth's biosphere
and provides an abundant energy at low cost. In
this paper we are discussing how our natural
satellite MOON can help us in such case. We
have explored the space enough to build space
laboratories. It is also possible to build a power
station in moon as we have adequate knowledge
on robotics. Moreover, we have construction
materials in moon which reduces the erection
cost as well as the transportation cost. Moon
gets more sunlight than earth and it has
abundant quantity of Helium-3 resources which
is not present on earth. Here we are describing
the power production methods from Solar and
Helium-3 resources in moon. Also we are
describing the power transmission from moon to
earth via Microwaves.

As global energy demands continue to grow and non-renewable energy sources steadily
dwindle, human beings will need to turn to new and innovative ways to quench our energy
thirst. Nuclear fusion is a promising technology that is destined for the limelight with the
completion of the International Thermonuclear Experimental Reactor (ITER) set for 2016.
ITER is an international collaborative project which aims to demonstrate the feasibility of
sustaining an energy-positive fusion reaction for the first time.

Climate change, pollution, and energy insecurity are among the greatest problems of our time. Addressing them requires major changes in our energy infrastructure. Here, we analyze the feasibility of providing worldwide energy for all purposes (electric power, transportation, heating/cooling, etc.) from wind, water, and sunlight (WWS). In Part I, we discuss WWS energy system characteristics, current and future energy demand, availability of WWS resources, numbers of WWS devices, and area and material requirements. In Part II, we address variability, economics, and policy of WWS energy. We estimate that ∼3,800,000 5 MW wind turbines, ∼49,000 300 MW concentrated solar plants, ∼40,000 300 MW solar PV power plants, ∼1.7 billion 3 kW rooftop PV systems, ∼5350 100 MW geothermal power plants, ∼270 new 1300 MW hydroelectric power plants, ∼720,000 0.75 MW wave devices, and ∼490,000 1 MW tidal turbines can power a 2030 WWS world that uses electricity and electrolytic hydrogen for all purposes. Such a WWS infrastructure reduces world power demand by 30% and requires only ∼0.41% and ∼0.59% more of the world's land for footprint and spacing, respectively. We suggest producing all new energy with WWS by 2030 and replacing the pre-existing energy by 2050. Barriers to the plan are primarily social and political, not technological or economic. The energy cost in a WWS world should be similar to that today.

That 1 million metric tonnes of He3, reacted with deuterium, would generate about 20,000 terrawatt-years of thermal energy. The units alone are awesome: a terrawatt-year is one trillion (10 to 12th power) watt-years. To put this into perspective, one 100-watt light bulb will use 100 watt-years of energy in one year.

That's about 10 times the energy we could get from mining all the fossil fuels on Earth, without the smog and acid rain. If we torched all our uranium in liquid metal fast breeder reactors, we could generate about half this much energy, and have some interesting times storing the waste.

Why go to the Moon? The objectives of lunar exploration will be based on human
society’s need for more information, energy, and raw materials that constitute the
principal underpinnings of economic growth. The chief themes addressed here are
the expansion of humans into space, space industrialization (possibly including
tourism), space transportation, the search for more energy, the Moon as a laboratory
for planetary science, and astronomy and other science on the Moon.