In the lead up to the World Mayor's Climate Summit in Mexico City in November, we invited you to send world mayors your climate questions.
Entries came in from across the world including the U.S., India, Chile and the Netherlands, covering everything from green buildings to recycling, air pollution and nuclear energy.
We put a selection of iReport questions to the mayors at the conference on November 21.
The best questions and answers will appear on CNN International. You can see them online here.

