Taking your car to the mechanic is convenient, but it isn't always the cheapest. Diagnosing your car yourself, for example, can save you a lot of money.

In more than half of U.S. states, Republican and Democratic lawmakers have introduced legislation that would boost adoption of DIY solar systems.

The economy needs energy across sectors to run smoothly, making these companies potential buys. Countries around the world are increasing renewable energy production to mitigate climate change. In the ...