Naperville gets nearly 80% of its electricity from coal, a leading source of greenhouse gas emissions. While the city is locked into an agreement with its power supplier until 2035, an extension to that contract is looming, and some residents and environmental advocates are urging the city council to consider other options.
Naperville News Digest: Walmart offering free screenings, low-cost shots Saturday; Heroes and Helicopters event being held at Frontier park; park district announces hours for the end of summer chicagotribune.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from chicagotribune.com Daily Mail and Mail on Sunday newspapers.