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Look for an American goldfinch during Saturday's Big Day birding event. (Ken Gibson / Flickr)

This weekend, people around the world will report their bird sightings as part of a massive citizen-science project. Here’s how it works.

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The University of Illinois at Chicago Circle (now UIC) was a hub for the first Earth Day. (Courtesy UIC archives)

Chicago was a hub for environmental activism on the first Earth Day, and it remains a pioneer today.

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Montrose Point Bird Sanctuary (Courtesy Openlands)

Environmental nonprofit Openlands created a new online tool to help Chicago-area residents easily identify ways to explore the outdoors in and around the city. 

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(Laura Marie / Flickr)

Chicago-based environmental group Openlands has received a $1 million grant to address climate change by planting new trees and recruiting residents to protect them.