In this lesson: Students build on these ideas by creating a physical model of the water cycle. Students use water, ice, and plastic wrap to model the ocean and cold upper atmosphere. Students use ...

Although nitrogen is very abundant in the atmosphere, it is largely inaccessible ... an ever-increasing impact on the global nitrogen cycle. Human activities, such as making fertilizers and ...

This story is part of Planet or Plastic?—our multiyear effort to ... a marine biologist with the National Oceanic and Atmospheric Administration. “Imagine you ate lunch and then just felt ...

It performs its own life cycle. “Why all that matters is some of that, that sitting there will be pulled up into the atmosphere ... actually separating our plastic from every other recyclable ...

Purging our world of microplastics requires change at the government level. But until that happens, here are some things ...