Sérgio Orozco, Medellin's environment secretary from 2016-2019, says the results from the project surprised him positively. "The reduction in temperature, in some zones by more than 3C (5.4F ...

In one impoverished neighborhood of Medellin, Colombia, residents are tackling the effects of climate change in part by filtering their own drinking water. In Colombia's second-largest city, rainy ...

Can air pollution cause inflammation? Scientists are starting to unravel the connection. A growing body of research is showing how breathing polluted air impairs the immune system’s ability to ...

When pollution gets higher than 38 µg/m3, the valley's early warning system generates an alarm that can lead to restrictions on car use and advises people, especially the vulnerable, to stay at home.