Don't kill the messenger; Twitter channeled plenty of political poison in the 2016 presidential contest, but it also served as an organizing platform and a therapeutic outlet on a global scale.

To support cities in climate sustainability, the Cities and Climate Change Initiative (CCCI) from U.N. Habitat collaborated with other agencies to develop the report "Guiding Principles for City Climate Action Planning."

Dear Mr. President-elect: Considering who your closest advisors are, it is a fair guess that no one else will give you a briefing on sustainability.

It’s a basic truth — we tend to see what’s right in front of us.

Since 2008, deep inside a mountain on a permafrost-crusted archipelago near the North Pole, the Svalbard Global Seed Vault has been open for business, soliciting and accepting sample seed collections from partner seed banks around the globe.

Virtual Reality dates to the 1950s, but 2016 is its seminal moment. With the launch of consumer VR systems we are entering a new reality of how we experience and interface with our technology.

We live in a world burdened by large-scale problems that refuse to go away: the refugee crisis; terrorism; rising sea levels; frequent floods, droughts and wildfires; not to mention persistent inequality and violation of basic human rights across the world.

Nothing on Earth moves without energy, and most of the energy that people use is of the fossil variety: coal; oil; and natural gas.

In 2012, Paul Polman, the chairman of Unilever, a global consumer goods company, wrote, "It is evident that an economy that extracts resources at increasing rates without consideration for the environment in which it operates ...

Globalization creates winners and losers.