Clean Cities
How a gas-leak crisis points to air filters for classrooms
Some schools got air filters. Others didn't, and a difference in test scores suggests the filters are the reason.
In Aarhus, a bell tolls for new babies – and calls us to action
For whom does that bell toll? It is for everyone in Aarhus, and for all of us in our house.
REN21: Renewables in cities can ignite global change
According to a new report cities can resolve most of those emissions by switching to renewables.
New York ‘trash guy’ has a museum of 45,000 rescued objects
“Before you throw something out, think about it,” says Nelson Molina. “Everything can have a home.”
Rwanda looks to ‘leapfrog’ past fossil fuels with EVs
Rwanda's pilot program hopes to advance clean transport.
A new online hub lets cities step up their climate action
The C40 knowledge hub seeks to equip city policymakers with the tools to accelerate climate action.