Trump withdrew the US from the Paris climate treaty, freezing billions in environmental projects.
In Chicago, grants for pollution reduction, electric vehicle infrastructure, and rail expansion were halted.
Conservationists warn the cuts will worsen air and water quality, impacting public health. Residents report declining air conditions in industrial areas.
Experts say the move could cost US jobs and give China an edge in green tech.
Scientists also warn of increased extreme weather events. Critics argue the decision sacrifices long-term progress for short-term savings.
