Environment challenge: Use a cleaner resource without environmental impact. The reality, even good environmental intentions produce by-products and/or have risk than need to be monitored. Check out this insightful article about natural gas.
Fact: Natural gas now produces 27 percent of the electricity generated in the United States, and the percentage is rising. Natural gas is cleaner than coal and at a lower price point. But as with all energy producing resources, there is an enemy and in this case, the arch enemy is methane. What is worse, it is leaky. The New Times Editor, John Schwartz, digs in deep of the issues, long term implications, political policies, and environmental impact of natural gas.