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The problem of mountain lions

May 5, 2025 By EarthWise Leave a Comment

Mountain lions – also known as pumas, cougars, and even sometimes panthers – are the most widely distributed wild land mammal in the world. They are found from Canada to South America. There are an estimated 30,000 mountain lions in the United States, mostly in the West, but there are also mountain lions from the Midwest to the East Coast.

Unlike wolves or grizzly bears, mountain lions are not managed by the federal government; they are managed by states and state regulations vary greatly. In some places, hunting mountain lions is banned completely; in other places, it is always open season.

As more people encroach on wild land – building homes and small farms, as well as hiking and biking – the numbers of encounters between people and mountain lions are increasing. And when mountain lions lose their fear of people, there is trouble.

Since 1890, there have been at least 32 fatal mountain lion attacks on humans and more than 170 non-fatal attacks. California has seen the most attacks in the last 40 years with 22 people injured and four killed. Despite this, Californians passed a ballot initiative in 1990 that bans all hunting of mountain lions.

There are strategies to reduce habituation and instill fear of humans in mountain lions. One is called “tree-and-free” that uses dogs to chase mountain lions up trees. But there are opponents of this and other measures employed.

The fact is that there are simply too many mountain lions living in close proximity to humans and peaceful coexistence is very difficult to achieve. Places where hunting lions is permitted have few problems with them, but that is not a solution that is acceptable in many places. It’s a difficult problem.

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Web Links

Deadly Encounter: Mountain Lion Attacks Spark Controversy

Photo, posted March 26, 2013, courtesy of the USFWS via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Online Shopping And Greenhouse Gas Emissions | Earth Wise

April 3, 2020 By EarthWise Leave a Comment

These days, consumers have multiple choices for how to shop for even the most mundane products. There are both traditional and online ways to buy most so-called fast-moving consumer goods, such as cleaning supplies and packaged foods. Price, quality, convenience, and time-frame guide our choices.

In the past, these things were always purchased by going to “Bricks & Mortar”, that is, physical retail stores. But now, we can order them from physical stores and have them delivered directly by the store – which is known as “Bricks & Clicks” – or we can order them online from an e-tailer and have them delivered by a parcel delivery company or the post office, so-called “Pure Play” online purchasing..

The carbon footprint of these three approaches depends on multiple factors according to a new study published in Environmental Science and Technology. The study looked at the impact of transport, warehouse storage, delivery, and packaging.

Overall, the greenhouse gas footprints per item purchased at Bricks & Mortar were higher than those of Bricks & Clicks but lower than that of Pure Players. But the results were highly dependent upon how many items were actually being purchased, and where the consumers lived. The type of items also mattered. For example, clothing purchased from a pure-play online source is much more likely to be returned than if purchased in a store.

Bricks & Mortar shoppers could reduce their footprint by 40% by walking or biking to stores, and Pure Players could cut emissions by 26% by switching to electric vehicles for the delivery of products from parcel distribution centers to consumers’ homes.

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Web Links

Comparing greenhouse gas footprints of online versus traditional shopping

Photo, posted July 15, 2017, courtesy of Elaine Smith via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.