Designers Jason Klimoski and Lesley Chang transform discarded containers into fluffy clouds

Project aims to transform LA billboards into aerial gardens

New EV program aims to improve city transportation options

Yes, seriously

Recycle Across America looks to make recycling as automatic as stopping at a red light

Artist and Tree Activist Gillian Ware on preserving and respecting the arboreal world

A magnificent, multifunctional green roof in Copenhagen

An epic quest by James Bowthorpe to row the Hudson River from its source to NYC -- in a kayak made of recycled waste

Innovation group challenges people to re-imagine the city of the future

Photo series captures the energy and bustle of the megacity