Mallard pair at the at John Heinz National Wildlife Refuge, Philadelphia, Pennsylvania.
Much of the money for wildlife conservation in the United States comes from taxes and fees paid by sportsmen. But as fewer Americans take up hunting, wildlife managers need other funding sources.
Mountain biking seems harmless but can damage soil and scare wildlife.
National parks and nature reserves are vital for conservation, but are also great places for recreation. Balancing the two is tricky, but it can be done if we realise parks are not just playgrounds.
How much would you pay to make this disappear?
Emilian Robert Vicol
What would you pay to keep trash off your favorite beach, or pollution away from a national park? Economists can tease these values out of our travel choices and use the numbers to help make policy.
The Berry Fire burns in Grand Teton National Park, Wyoming, August 27, 2016.
AP Photo/Brennan Linsley, File
With elevated wildfire risks forecast across much of the western US this summer, here's how travelers can track local conditions, stay out of harm's way and avoid accidentally starting fires.
A luxury home near Philadelphia.
Middle-class houses in the US have grown ever larger. The average single-family home is almost twice the size of a home in the 1960s. It's time to consider the downsides of sizing up.
Older people in a park in Nanchang, China.
You don't often see many of the nation's 75 million seniors hanging out in parks. There may be a reason. Most parks are not designed with seniors in mind. Here are some ways to change that.
REI's 'Opt Outside' campaign makes a virtue of shunning Black Friday and hiking instead of shopping. But while outdoor retailers preach sustainability, they still fuel our consuming habits.
As professional sport lurches from crisis to crisis, is there still room for amateurs to enjoy sport at their own pace?
Australian male sport is facing increasing public scrutiny in relation to ethics, conduct and cultural legitimacy. Our sports media is saturated with reports of drug enhanced desires for speed and strength…