1. Fusion uses two isotopes of Hydrogen: Deuterium, with one proton and one neutron, and Tritium, with one proton and two neutrons.
2. Fusion occurs when Deuterium and Tritium are forced together by raising the temperature to 150 million degrees Celsius.
3. That creates Helium, a free neutron, and a tremendous amount of energy. Fusing 1kg of Deuterium and Tritium creates enough energy to power a 100 watt light bulb for 100,000 years.