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Caribou, migrating birds and many other types of wildlife rely on this expanse of wetlands and tundra. Humanity and the climate depend on a healthy Arctic, too.

The White House proposal represents a dramatic retreat from the national goals of clean air and clean water enacted in federal laws over the past 55 years.

Fears about supply, demand, profits and supply chains all combine into a volatile mix that delivers prices that are often higher in a crisis, but also change more rapidly and by larger amounts.

The risk of harmful algal blooms can be reduced. The biggest drivers of the increase are farm fertilizer and climate change.

The blooms have become an annual problem in the Great Lakes. DNA studies show what's growing there and why it's dangerous.

Risk models can't rely just on the past anymore. A team of geoscientists suggests new ways to forecast evolving hazards in real time as cascading disaster risk worsens.

Risk models can't rely just on the past anymore. A team of geoscientists suggest new ways to forecast evolving hazards in real time as cascading disaster risk worsens.

None of the analyzed bags of lump charcoal gave buyers as much effective grilling fuel as their labels promised.

Fishing was once more open to all off New England. After devastating fishery collapses, stricter rules helped fish stocks recover, but they also changed the face of fishing and the lives of fishermen.

Fishing was once more open to all off New England. After devastating fishery collapses, stricter rules helped fish stocks recover, but they also changed the face of fishing and the lives of fishermen.