More than half of the world's population already lives in cities, and another 2.5 billion people are projected to move to urban areas by 2050. The way we build new cities will be at the heart of so much that matters, from climate change to economic vitality to our very well-being and sense of connectedness. Peter Calthorpe is already at work planning the cities of the future and advocating for community design that's focused on human interaction. He shares seven universal principles for solving sprawl and building smarter, more sustainable cities.

Learn more about the process behind creating 3D printer aquatic macroinvertebrate models. Plus, gain access to the files needed to print your own. In Orleans Parish, if you are in need of access to a 3D printer, check out Delgado Community College's FabLab!

Coastal Louisiana has lost an average of 34 square miles of land, primarily marsh, per year for the last 50 years. From 1932 to 2000, coastal Louisiana has los 1,900 square miles of land, roughly an area the size of the state of Delaware. If nothing is done to stop this land loss, Louisiana could potentially lose approximately 700 square miles of land...in the next 50 years. Further, Louisiana accounted for an estimated 90 percent of the coastal marsh loss in the lower 48 states during the 1990s.

The Ocean Conservancy released on Wednesday its International Coastal Cleanup (ICC) report, a compilation of litter collected from a one-day cleanup of beaches and waterways worldwide. For the first time since the report's inception more than 30 years ago, the 10 most common items picked up by volunteers around the world were made of plastic. Foam takeaway containers booted glass beverage bottles from this year's list.

#TeamSeas will be one of the biggest, baddest, most-impactful cleanup projects of all time - and here's how we're doing it. See our cutting-edge river Interceptors, info on locally-organized cleanups, ghost-gear removal efforts and professional expeditions to areas where we can have the greatest conservation impact!

Use this quiz from NASA to "test your knowledge of sea level and its relation to climate change and our quality of life."