BBC . During the rally, he suggested that the idea to install solar panels on the hypothetical wall was originally his, though the green amenity had been included in several companies’ bids to plan and construct the wall. “ We’re thinking of something that’s unique, we’re talking about the southern border. Lots of sun, lots of heat,” Trump said. “ We’re thinking about building the wall as a solar wall, so it creates energy, and pays for itself. And this way Mexico will have to pay much less money…Pretty good imagination, right? Good? My idea.” The Mexican border wall had been a cornerstone of Trump’s campaign for president last year. The Department of Homeland Security invited construction companies to submit proposals for the wall’s design after the January inauguration. Two hundred companies have responded so far and 20 have been short-listed. Bloomberg reported that stocks of solar panel companies […]