San Jose Mercury News: Gas for school buses is up. So is food for the cafeteria. Ditto for health benefits. So schools are trying to shave another big expense – the monthly electric bill. Increasingly, they’re turning to solar panels. To finance the pricey installation costs, they’re passing bonds and partnering with third-party businesses. The results are lower costs – and bonus science lessons for students eager to learn about green energy. Milpitas Unified School District broke ground Wednesday to …