Answer: Lasers

At the recent Sixth European Conference on Space Debris, an EOS Space Systems announced a technology more than 10 years in the making: ground-based lasers.

Now teamed with NASA, and with funding from the Australian government, the lasers will put out energy roughly equal to that the radiation pressure created by the Sun, which will be enough to push pieces of space junk out of their dangerous orbits and away from Earth.

Photo courtesy of University of Southampton