DevonWilson May 18, 2018 02:17 PM I endorse the idea that the world energy demand can be met by renewable energy alone even without storage.The reason why this can happen is the advent of decentralized hydro technology.This is a hydro system that can be deployed basically anywhere and is completely eco-friendly and weather proof. Daishi May 18, 2018 06:18 PM Inexpensive renewable technologies are essentially here. The next problem to solve will be inexpensive renewable storage. Pumped hydro is a type of clean renewable storage (the most common today). Clean grid storage methods are mostly sparse today because up until recently there has been no real need for them to exist. Renewables are creating the need now. Create an arbitrage market for storage and you will see more R&D in the space. S Michael May 18, 2018 06:35 PM Storage is the key. Spend a billion on battery research and reap the benefits. The first country to develop a new battery will be the leader. aksdad May 19, 2018 03:53 AM Instead of scrutinizing other academic papers and playing with math, they might try pulling their heads out of their institutional bubbles and scrutinize actual power plants and the real world to see why renewables can’t provide 100% of the world’s power needs. Renewables aren’t practical without viable power storage. “Viable” means “cheap enough to compete with existing energy production methods”. Since no such technology exists, the next best thing is backup from “base load” power plants which means available 24/7, 365 days a year. Which means coal, natural gas, or nuclear. That’s right folks, without fossil-fueled power plants, renewables can’t work. Yet. JimFox May 20, 2018 10:40 AM I don't believe this for a second-it takes no account of future energy demand growth nor of the unpredictable CC effects. MSR's are the future, not renewables alone. JimFox May 20, 2018 02:06 PM Do not believe it- assumptions likely based on existing energy demand; which will likely double in 10 years. Nuclear MSR's are the true solution. "This is a hydro system that can be deployed basically anywhere and is completely eco-friendly and weather proof." Controversial claim- who can say what CC effects will have on hydro? Wind/solar are essential components but what % of world energy do they now supply? Something around 14% as far as I can discover- encouraging but hardly conclusive. JimFox May 20, 2018 02:14 PM Professor William Laurance from James Cook University in Australia. "Hydro projects are such a disaster for tropical rainforests that I don't consider them 'green' energy at all," added Laurance. Wind turbines and solar panels can also cause environmental harm, but on a much lower scale compared to hydropower. However, these industries have expanded enormously in the past decade. In total, renewable energy accounts for a quarter of global electricity Robert Schreib May 21, 2018 01:05 AM Dear Sirs, To fight global warming, have the United Nations create 'The Global 50/50 Lottery', the world's first honest global lottery, to raise the massive funds needed to buy clean electricity generating wind, solar, geothermal, nuclear, ocean and water systems, to replace the electricity from out coal burning electric power plants, which are emitting the carbon dioxide that is causing global warming. Remember, human greed is like a force of nature that can move mountains. If we can exploit it to fight global warming, we just might beat it! Nik May 22, 2018 08:13 AM Wind and solar energy are both 'backyard' solutions to energy supply as they are intermittent, short lived, expensive, and worse, unreliable. The only real alternative, consistent, energy supply is geothermal. The USA has loads of it available, (Yellowstone etc.) but it's mostly ignored. Iceland uses lots of it, sometimes they get more than they want, in the form of a volcano! The Earths subterranean heat source is constant, clean, and ample to supply all humanities needs for as long as they may exist. Even the Romans used it! The technology already exists and is well developed. The oil industry has the necessary experience and equipment for deep drilling works. Governments, worldwide, need to wake up and start investing in geothermal generating plants. Ignoring it is utterly stupid. amazed W1 May 22, 2018 09:32 AM Along with Robert Schreibs suggestion, the United Nations MUST also make a realistic prolonged attempt to convince all nations that the global population of humans cannot go on increasing for ever and realistically should go backwards. Bleats from the sociologists about the way the extended family works and from economists that only expanding ecomies can work should be the first points of attack. With better medical care no person should be genetically responsible for more than two offspring and with econmists forgetting their desire to be in favour with politicians can get down to the way it really works.