Resumen:
This video shows how acid mine drainage from an abandoned coal mine has affected Wildcat Branch in Kentucky's Daniel Boone National Forest. Macroinvertebrates and the larger animals that feed on them are almost entirely absent, and reproductive cycles have been completely disrupted.

Resumen:
Using images and graphs, this interactive resource illustrates scientists' efforts to study Earth's climatic history for the last 250,000 years by drilling into the Greenland Ice Sheet and examining ice cores.

Resumen:
This Building Block video features a wide-shot of a working pumpjack, or grasshopper oil rig, caught between the beige earth and bright blue sky.

Resumen:
In this video, an environmental technologist visits an abandoned coal mine in Kentucky to talk about how a remediation system (a series of settling ponds and treatment cells) is neutralizing the acid drainage from the mine and preventing damage to a creek downstream.