According to Emeka Nelson, he makes an electricity generator that is powered by water (Hydroelectric generator).
He also invented what he calls the “MGBANWE C12”, a machine that turns non-biodegradable wastes like plastics, waterproof nylon, etc into petrol, kerosene, diesel and some other heavy oils and interlocking stones. Emeka hails from Nsukka , Enugu State.
Source: Emeka Nelson | Facebook