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Become a Member
Membership
Join Chicago's climate action community with a CAM membership. Your name joins a network of change-makers standing together on climate.
Why is $4.27 included in our price?
CAM has two membership pricing options:
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$24.27 for students and people under 25
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$64.27 for 25 and older
We include $4.27 in our price as a reminder of the concentration of CO2 in the atmosphere, which as of 2025, is an average of 427 parts per million (ppm). In the 10,000 years leading up to the Industrial Revolution, the CO2 concentration was 280 ppm.
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