If you want an arcade racing game that's less like a simulator and more about speeding down the track while grabbing bonus items, Asphalt 7 is one of the best in the App Store.
For arcade racing, you can't do much better than Asphalt 7. Tons of tracks and licensed upgradable cars mean lots of arcade-racing fun.
Similar to cool roofs, light-colored pavement developed by a Phoenix company is designed to reduce the urban heat island effect and reflect heat back into space.
Massachusetts researchers argue in paper that blacktop roads would make better solar collectors than solar-electric panels by converting built-up heat into water-carrying pipes.
It's like an outdoor radiant floor heating system. It melts ice and the excess energy can help heat or cool buildings.