One of my favorite things is to sit on a rock and listen to the sounds of a forest, knowing that someone else might do the same thing in the same place 100 years from now.

Let’s face it. We live in an incredibly divided world.

She went shopping. With her five kids, four of them girls. Two answers started to appear — "go local" and "no new stuff."

China has grand plans to green its buildings.

In the prevailing narrative of the rooftop solar industry, the dominant theme is combat.

You often hear about renewable energy success stories in cities in the developed world — such as Vancouver, which has committed to get 100 percent of its energy from renewable sources before 2050, or San Diego, which has promised to obtain 100 percent renewable electricity by 2035.

The mission is ambitious, the motivations are myriad and the methods are many. What's more, the progress is notoriously difficult to measure.

A warning: At the end of this article, I will raise some uncomfortable questions about sustainable development ...

Today, at VERGE 17, Google and the Ellen MacArthur Foundation are launching a report on Cities in the Circular Economy: The Role of Digital Technology.

Business leaders, government officials and members of civil society are gathering once again in New York City for Climate Week NYC.