You may be breathing easier these days because Illinois is leading the nation in switching to renewable energy.

The use of renewable energy in the state of Illinois has saved a significant amount of energy for residents. It has also reduced pollution levels by the equivalent of taking more than 1 million cars off of the road.

Over 90 Illinois towns have decided to transition to 100 percent renewable electricity by using a model called Community Choice Aggregation. It works by encouraging local communities to buy their own electricity from suppliers in bulk, rather than central purchasing agencies, which in turn decreases electricity rates.

Read about the process and find out if your town uses 100 percent renewable electricity in this report from the World Wildlife Fund.