Environment

University of Minnesota researchers developed a tractor engine that can run on a mixture of diesel fuel and anhydrous ammonia, a common nitrogen fertilizer.

The commissioner of the Minnesota Department of Natural Resources told a group of lake advocates on Tuesday that it's her personal mission to connect more people with the outdoors.

Enbridge's proposed Line 3 oil pipeline replacement likely could see more delays, after two state agencies involved in the project said Tuesday that the permitting schedule for the pipeline needs to be revised.

Over the last two years the nation had more polluted air days than just a few years earlier, federal data shows. While it remains unclear whether this is the beginning of a trend, health experts say it's troubling to see air quality progress stagnate.

A 25-year-old Lino Lakes man is facing a half dozen illegal hunting charges after shooting a pair of trumpeter swans in northern Anoka County last year.

The latest dispatch from wildflower experts Phyllis Root and Kelly Povo comes from the Lost 40, a plot of old-growth red and white pines in the Chippewa National Forest.

Cities, states, businesses and electric utilities are setting ambitious goals to cut greenhouse gas emissions. But it's not clear exactly how they'll do that or whether it will actually work.

Scientists Lee Frelich and Gayle Schueller discuss the impact of climate change, particularly in Minnesota.

Entrepreneurs are eager to find substitutes for plastic that naturally degrade. One option is a "natural" plastic made by microbes and then eaten by them. But the process is still in the early days.

It's part of an effort to address the rising costs of providing safe drinking water. The fee increase from $6.36 to $9.72 per connection takes effect on Jan. 1.

Is solar geoengineering a radical idea? Or is it likely to emerge as an important, supplemental tool in the fight against climate change?

So many gray whale carcasses have washed up this year along the Pacific coast that a federal fisheries agency says it has run out of places to take them.

At least 279 dolphins have stranded across much of the U.S. Gulf Coast since Feb. 1, triple the usual number, and about 98 percent of them have died, scientists from the National Oceanic and Atmospheric Administration said Friday.

After seeing widespread frosts across northern Minnesota on June 2 with many morning low temperatures in the 20s, June 13 brought frosts again with widespread temperatures in the 30s.

Staff scientists at the EPA had serious concerns last year that the PolyMet copper-nickel mine might not be able to meet state and federal water quality standards under the Clean Water Act, according to documents released Thursday.

Prosecutors dropped all criminal charges Thursday against eight people in the Flint water crisis and pledged to start from scratch the investigation into one of the worst man-made environmental disasters in U.S. history.

Most of the Minnesota rivers that flooded this spring have returned to more normal levels. But some lakes around the state remain historically high, causing property damage, eroding shorelines and frustrating lake property owners.

It's hurricane season again. In the past few years several hurricanes have intensified so rapidly it surprised forecasters.

The Pentagon has long acknowledged climate change has broad implications for national security. That is especially clear in the Arctic, where melting ice is opening new shipping lanes.