Trees Save Big Cities $500 Million Each Year

iStock
iStock

As if you really needed another reason to hug a tree: Scientists writing in the journal Ecological Modeling say trees in big cities deliver more than $500 million in environmental benefits every year.

A tree is a marvel of biology. Unfussed by the pull of gravity, it sucks water upward; unembarrassed by its resourcefulness, it makes food out of the waste gases we leave behind. And that’s just what it does for itself; for us, it does even more, cleaning our air, beautifying our neighborhoods, improving our health and well-being, reducing our energy use, and helping us beat the heat.

"Trees have direct and indirect benefits for cooling buildings and reducing human suffering during heat waves," lead author Theodore Endreny of the SUNY College of Environmental Science and Forestry said in a statement. "The direct benefit is shade which keeps the urban area cooler, the indirect benefit is transpiration of stormwater which turns hot air into cooler air."

Endreny and his colleagues wondered how these qualitative effects might translate into dollars, or rubles, or rupees. The researchers used a tool called i-Tree Eco to estimate the amount of tree cover in 10 huge cities: Beijing, Buenos Aires, Cairo, Istanbul, London, Los Angeles, Mexico City, Moscow, Mumbai, and Tokyo.

These densely packed megacities are home to almost 10 percent of the entire human population of Earth—people whose lives often depend on natural environments outside city limits.

“What is, however, most often disregarded,” the authors note, “is that nature conservation in the city can also contribute to human well-being benefits. The most common mind set separates cities from the rest of nature, as if they were not special kinds of natural habitats.”

Their results showed that those urban natural habitats occupied about 21 percent of each megacity landscape. That’s a lot of tree cover, but there could be a lot more; on average, the researchers found another 19 percent of land that could be given over to vegetation.

The data suggested that filling this space with trees could increase environmental and cost benefits by an average of 85 percent.

As they are now, the trees are already saving megacities gobs and gobs of money—about $1.2 million per square mile, or $35 per resident, per year.

"Placing these results on the larger scale of socioeconomic systems makes evident to what extent nature supports our individual and community well-being by providing ecosystem services for free," co-author Sergio Ulgiati of Italy’s University Parthenope said in the statement.

"A deeper awareness of the economic value of free services provided by nature may increase our willingness to invest efforts and resources into natural capital conservation and correct exploitation, so that societal wealth, economic stability and well-being would also increase."

2624-Year-Old Cypress Tree Discovered in North Carolina Swamp

iStock/earleliason
iStock/earleliason

National Love a Tree Day on May 16 is a day to appreciate all the world's trees, but a bald cypress recently identified in North Carolina is especially deserving of recognition. As Live Science reports, scientists date the tree to 2624 years old, making it one the oldest living non-clonal trees on Earth.

For their study, recently published in the journal Environmental Research Communications, a team of researchers studied the rings of trees in North Carolina's Black River swampland to learn more about climate history in the eastern United States. Bald cypresses are known to have impressive lifespans, but after analyzing specimens in the Black River's Three Sisters Swamp, an area that's notable for its long-lived trees, the scientists discovered that cypresses can grow to be even older than previously believed. The 2624-year-old cypress tree they found predates the Great Wall of China and the Roman Empire. Other remarkably old trees, including a 2088-year-old cypress, were also identified in the same grove.

The North Carolina cypresses are old, but there are other types of trees that can grow to be much older. Clonal tress are genetically identical plants that reproduce asexually from a single ancestor. Old Tjikko, a clonal tree in Sweden, has a root system that dates back 9550 years.

Despite all that North Carolina's bald cypress trees have endured, their lives are under threat. The swamp where the 2624-year-old tree stands is located just 6.5 feet above sea level, which means that floods driven by climate change could damage its habitat. And though the grove is in a protected area, industrial runoff and logging that's happening nearby could impact the trees' health. North Carolina is considering establishing a Black River State Park where the trees grow to further protect the ancient natural wonders.

[h/t Live Science]

This Beverage Maker Lets You Enjoy Carbonated Drinks Without Hurting the Environment

Sparkel
Sparkel

Whether you're preparing breakfast before you head off to work or looking for something to wash down lunch, procuring the perfect beverage is vital. If it's a carbonated drink, though, with that comes the carbon dioxide emissions that arise every time you hear that classic "fssst" sound from cracking one open. These emissions are actually quite harmful to the environment.

But thanks to the newly unveiled Spärkel, curating carbonated drinks can be done without using CO2 or any artificial ingredients.

"If you walk into any grocery store, the explosion in the popularity of sparkling drinks is plain to see with more choices and flavors than ever before, but why buy off-the-shelf when it is healthier, cheaper, and more fun to create your own drinks at home?" Darren Hatherell, CEO of Spärkel, said in a press release. "With Spärkel, we created a system that lets people use the freshest ingredients and convenient carbonation process to experiment and unleash their creativity in a way that is kind to their wallet and the environment."

Users can place any kind of ingredients they wish—berries, citrus, cucumbers, etc.—along with their drink of choice—water, tea, cocktails—into the 25 oz. (750 mL) bottle and choose what level, from one to five, of fizz they'd like to have added to their drink. The sealed chamber generates CO2 naturally from a sachet of Spärkel Carbonator powder, which is "made of a special granulation of citric acid and sodium bicarbonate." The CO2 bubbles are cycled through the liquid, and within a couple of minutes, you have a completely personalized sparkling drink.

On top of all that, the beverage maker is suitable for any number of usages from water and juices to cocktails. It also comes in nine different colors—black, white, gray, yellow, orange, red, blue, green, and pink—so it can match up with whatever kitchen palette you have.

To get your hands on the Spärkel, check it out on Indiegogo, where it's available for a pre-sale price of $59.

Mental Floss has affiliate relationships with certain retailers and may receive a small percentage of any sale. But we choose all products independently and only get commission on items you buy and don’t return, so we’re only happy if you’re happy. Thanks for helping us pay the bills!

SECTIONS

arrow
LIVE SMARTER