Don't know if you could do a segment on it, but I've always considered SBSP (space based solar power) the <b>ultimate</b> power source for Earth's needs. Imagine: solar panel arrays of any size or quantity (space is VAST). The collected energy is transmitted via gentle microwaves to airport-sized receiving antenna arrays; this alone would remove the need for a huge amount of expensive transmission line infrastructure worldwide. Power would be generated continuously, 24/7, without interference from weather or night, and these gigantic orbiting solar panel arrays would not interfere with local ecologies. The electricity would feed the existing grid, and also be used to cleanly produce hydrogen and oxygen from sea water. Hydrogen can be liquefied or infused into holding cells, and either form could be used to power all forms of transportation. When hydrogen is burned, the “exhaust” is water vapor. We could end the use of all fossil fuels (oil, coal, gas), and we could shut down all the nuclear power plants, everywhere. We could use excess energy to pump water up into existing lakes or dams, and regain the energy from existing hydroelectric plants. The biggest challenge to this concept is getting payloads into space cheaply. This could possibly be done using a mag-lev launch platform; a space rail gun, so to speak.<br>-<br>Nuclear is not an option for future energy needs. Factoring in the costs of mining (which burns fossil fuels), refining, handling, using and storing nuclear fuel and its waste products, not to mention protecting the plants and by-products from attack or misuse) space-based solar is way more optimal than nuclear energy. We as a species really need to start doing this, as in "yesterday!"