Mexico City is the 5th largest city in the world with population of around approximately 22 million, which classifies Mexico city as a mega city. It is situated in the The Central Mexican Plateau, at 2,240m in elevation. Mexico city is also slowly sinking at a rate of about 10 inches per year! The ...

The future of sea travel could be here -- and it just might help save the planet. A hydrogen-powered ferry that produces zero emissions will soon launch in the San Francisco bay.

‘Support’, a new sculpture by world renowned artist Lorenzo Quinn, was created to coincide with the opening of this year’s Venice Biennale International Art Exhibition. It is one of many art projects drawing attention to the impacts of climate change ahead of COP23, the upcoming UN Climate Change Co

United Nations - Statement by Mr. Leonardo DiCaprio, UN Messenger of Peace with a special focus on climate change, at the opening of the Climate Summit 2014.

When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains in this movie remix.

This is my "Change the World" project for my school environmental science class.

Exxon research scientists warned about the effects of fossil fuels as early as 1977. Exxon has known about climate change for almost 40 years, despite its efforts to continue to promote fossil fuels and deny its existence throughout the 1990s as a leader of the Global Climate Coalition.

Forty world leaders are taking part in a climate change summit hosted by US President Joe Biden. Alice Hill, David M. Rubenstein Senior Fellow for Energy and the Environment at the Council on Foreign Relations, shared her thoughts on the meeting.

In every female kobudai... is a male in waiting. Animals in the genus Semicossyphus belong to the wrasse family, or the Labridae. Other members of the family and some fish in other families can also change their gender. They develop the reproductive organs, external features, and behavior of the op...

Penn was built on the concept of innovation. “If it’s new, novel and holds promise to change the world,” says President Amy Gutmann, “you’ll find it at Penn.”