The Obama administration is taking shape with many key environmental appointments to the cabinet and elsewhere. This is the first half of our guide to the new players, their backgrounds and agendas.

The Obama administration is taking shape with many key environmental appointments to the cabinet and elsewhere. This is the second half of our guide to the new players, their backgrounds and agendas.

Five federal agencies that are responsible for management of a high percentage of US lands and waters are doing a poor job preparing for the effects of climate change.

Harmful algal blooms are increasing and now occur offshore of every coastal state and in some inland waters.

Lately the term "green infastructure" has gotten more specific as many cities seek more robust and cost-effective stormwater management.

The summer of 2007 was another hot one in the US and worldwide.

Vehicle fuel economy is a major component of the ongoing energy and carbon discussions, so it's helpful to know how the current models are performing.

EPA is required to update its standard for each of the six main "criteria" air pollutants every five years.

The US Office of Surface Mining Reclamation and Enforcement (OSM) is trying once again to establish a rule updating its regulation of coal mining waste placement.

With hurricane season in full swing, NOAA's new resource for identifying historical hurricane tracks may be a useful tool.