California’s largest lake is shrinking and migratory birds are disappearing as its water is now too salty for fish — an environmental disaster and a health hazard for humans.

Under the Magnuson-Stevens Act, commercial fishermen in the Gulf of Mexico use individual fishing quotas to manage red snapper catches sustainably and with far less risk.

The nation’s most important conservation and recreational access program has protected areas in almost every state and county, but it could soon expire without action by Congress.

Forest plantations in Florida are managed with prescribed fires that benefit wildlife and the owner’s bottom line.

Where the Colorado River approaches the Sea of Cortez, a new agreement between the U.S. and Mexico shares the river’s water during times of drought and surplus and dedicates water to the environment, restoring flows and habitat along the river and at the Delta. Conservationists are working hard to re-plant forests and promote wildlife habitat to revive the Delta after years of neglect and desertification. On the leading edge of agricultural technology, young farmers are using data to minimize costs, improve yield and increase profits; a fourth-generation farmer in Illinois shows how it’s done.

In Montana, conservationists, landowners, business leaders and government officials consider the importance of the most important yet least-known and understood conservation and access program in the U.S. – the Land and Water Conservation Fund. Farmers in Oklahoma use cover crops and smart pasturing of livestock to reduce their use of chemical fertilizers, improve water quality, and increase their bottom line. Researchers are finding useful purposes for recycled urine.

From recent episodes of THIS AMERICAN LAND, these brief summaries of stories highlight major repair and maintenance issues affecting America’s national parks.

With new water rights and a major irrigation project under construction, the Gila River Indian Community in Arizona is gearing up for a revival of an agricultural heritage that sustained them for centuries before white settlers arrived. Public-private partnerships in national parks are saving taxpayers money while supporting critical services, maintenance and repairs. With individual fishing quotas for red snapper, charter boat captains on the Gulf Coast adopt new sustainable practices that provide them with more income and safety.

A farmer in southwestern Iowa has a mission to develop his farm as an example to others, using no-till seeding, multi-crop and pasture rotation, minimal fertilizing, and runoff filtering to keep the nutrients in his soil and prevent runoff. The backlog of deferred maintenance in national parks is a growing problem that needs Congress to act: we see the need for urgent maintenance and repairs at the Grand Canyon, the National Mall, and the Martin Luther King, Jr. Historic Site in Atlanta. Rafting down the river through the Rio Grande Del Norte National Monument.