Renewable energy sources are becoming increasingly important as the world moves towards a more sustainable and green future. While solar, wind, and hydropower are some of the most well-known renewable energy sources, many unconventional and even weird energy sources could play a significant role in our transition to a greener future. Here is a closer look at six of the weirdest sources of energy: 1. Cow Poop Cow manure is an unlikely energy source that has been used for centuries. When cow manure is placed in an anaerobic digester tank, microorganisms…