As the world marks UN World Cities Day on 31 October—a call to make cities more sustainable—a new international study ...

UNDATED (WKRC/CNN Newsource) - A new scientific analysis suggested that adopting a diet beneficial for the planet could potentially feed the world by 2050. The report, compiled by a commission of ...

How high will the ocean rise under climate change? By 2050, scientists have a pretty good idea. But why does it matter where ...

For years the aviation industry has talked up supersonic jets, pilotless planes and aircraft powered by electricity or green ...