We (Google and other tech companies, backed by taxpayer dollars and federal loans) built a giant boondoggle called Ivanpah Solar Power Facility. It cost billions of dollars and doesn't work very well. It's terribly inefficient and terribly expensive and terribly dangerous for all the migratory birds and eagles that happen to fly through it's "beam". It looked good on paper though and the people that sold the idea must have had some really cool power points and brochures...and kickbacks to the politicians who approved and funded it. Hopefully the one you're talking about in the ME will actually work. In the USA, our electrical grid isn't designed for intermittent power generation like that from solar and wind. The grid, mostly built in the 1950s and 1960s won't work well with green energy. The cost to modernize the grid is estimated at over $5t...so more like $10t in reality. Not only is it expensive, it's complicated by rights of way and private property and other issues. We're a long, long, long way from being able to have a green energy grid. Nukes on the other hand, would work very well.