Renowden says that more sustainable solutions are needed in the fight against urban air pollution.

CNN: Smog-eating tiles gobble up air pollution

In the first of my three trips to the Americas over the next year, I will meet with our closest neighbors in Mexico, Central America and the Caribbean, to help our democracies and economies grow together, and to intensify our shared fight against crime, drugs, illegal immigration and pollution.

CNN: Bill Clinton Speaks To A Meeting Of Newspaper Editors

Beijing is under pressure to embrace more environmentally-friendly energy supplies to reduce pollution levels across the country and set a lead in the global fight against climate change.

BBC: NEWS | Business | China gets foreign oil incentives