National Park Service

(David Cappaert, Michigan State University)

The National Park Service is bracing for the possible loss of more than 900 trees near the Gateway Arch. That’s what could happen if the emerald ash borer makes it to the St. Louis area.

The emerald ash borer has killed millions of ash trees since it was accidentally introduced to the U.S. in the early 1990s.

(via Wikimedia Commons)

A national river quality organization has listed Missouri's Current River as a victim of over-use, and one of the most endangered rivers in America.

The report by American Rivers shows that in 1984 the Current River in the Ozark Riverways Scenic Park had only 13 access points.

Today, there are more than 130, leading to erosion, pollution and overuse.