To sum up, we need today a daring generation of young intellectuals determined to
bend their
energies to raise Bharat to its high status justified by the
human and material resources it possesses.
We've covered plenty of so - called
human - powered devices on TreeHugger and they've all fallen into two categories: friction - powered (triboelectric) devices that harness the
energy created from two materials rubbing together and piezoelectric devices that feature crystals that generate
energy from being compressed or
bent.