Christian Science Monitor: Muhammad Mokles plies the busy Dhaka streets in his green-painted auto-rickshaw. But when it’s time to refuel, he skips the traditional gas pump and goes straight to a compressed natural gas (CNG) station. It’s not only much cheaper than gasoline but it’s also much better for the environment. Here in Bangladesh’s capital, the streets overflow with thousands of noisy honking vehicles, pedestrians, beggar children, food vendors, and stray animals. Millions of people need to move around …