Dear EarthTalk: Would extending Daylight Savings Time (DST) year-round have benefits for the environment? -- Jane Wyckoff, Soquel, CA
The concept of “daylight savings time” (DST), whereby we set our clocks ahead by an hour from mid-Spring through mid-Fall so we can get more done using natural light later into the evening, was first proposed more than 200 years ago by Benjamin Franklin as a way to save money on candles (!). While Franklin’s idea didn’t catch on back then, Germany instituted a “war effort” version of it to conserve fuel during World War I. The U.S. followed suit in 1918 but scrapped the idea shortly after the war ended.
DST came back to the U.S. during World War II when FDR instituted it year-round as “war time” between February 1942 and September 1945. After WWII, some states adopted summer DST but it wasn’t until Congress passed the Uniform Time Act in 1966 that it became standard across the country (initially Arizona and Michigan opted out; these days only Arizona and Hawaii don’t observe DST).
This past November, Californians voted in an extension of DST year-round across their state. The rationale is that the twice-a-year time change causes lost or poor sleep which leads to more accidents, aggravates existing health issues and has even been linked to a short-term uptick in suicides. Oregon and Washington are also considering aligning with California so the entire West Coast could be on DST throughout the year.
But according to a 2011 study published in The Review of Economics and Statistics by researchers from Yale and Claremont McKenna, such a change may not be good news for the environment. “Our main finding is that, contrary to the policy's intent, DST increases electricity demand,” report researchers Matthew Kotchen and Laura Grant. “Estimates of the overall increase are approximately 1 percent, but we find that the effect is not constant throughout the DST period.” According to their data, DST causes the greatest increase in electricity consumption in the fall (estimates range from 2-4%) when dipping temperatures send Hoosiers inside earlier to turn up their thermostats. They estimate that increased energy demand as a result of DST adds ~$9 million a year to household power bills across Indiana while the “social costs” of the resulting increased emissions range from $1.7-$5.5 million annually.
Of course, mileage varies by region. A study by the California Energy Commission found that extending DST would have little to no effect on energy use in that state. Meanwhile, a U.S. Department of Energy analysis of 67 different power utilities across the country concluded that a four-week extension of DST would save Americans ~0.5 percent of electricity per day, or 1.3 trillion watt-hours in total — enough to power 100,000 households for a year.
Whether or not the recent interest in extending DST throughout the year on the West Coast will take hold across the country is anyone’s guess. In the meantime, we can all look forward to the second Sunday in March to spring ahead and leave the short and dreary winter days behind us — at least for a few months.
CONTACTS: “Does Daylight Saving Time Save Energy? Evidence from a Natural Experiment in Indiana,” ideas.repec.org/a/tpr/restat/v93y2011i4p1172-1185.html; “The Dark Side of Daylight Savings Time,” theconversation.com/the-dark-side-of-daylight-saving-time-91958.
Dear EarthTalk: I’ve heard about “Zero Waste” grocery stores in Europe where everything is sold in bulk and customers bring and fill up their own reusable containers and bags. When will we get some of these here on this “side of the pond”? -- Jane Smith, Boston, MA
Many mainstream American grocery stores and chains now have bulk sections for dried foods like nuts and spices, though most everything else still comes sealed in plastic, cardboard, aluminum or glass, which customers then recycle or discard once they devour the contents.
The U.S. Environmental Protection Agency (EPA) estimates that containers and packaging make up almost a quarter of all landfill waste, with the average American generating four pounds of trash a day, most of it food-related. Furthermore, Americans throw out about a third of the food we buy, largely because we’re forced to buy more than we need due to the way food is pre-packaged for sale.
One solution to both of these problems is the “zero-waste” grocery store which sells in bulk (or “loose”) to customers who bring their own containers and shopping bags and fill them up with just the amount of food they will eat. Besides the obvious environmental benefits of reducing the stream of waste to landfills and energy-intensive recycling processors, zero-waste grocery stores also tend to be easier on the wallet—given that packaging adds upwards of 40 percent to the cost of many everyday food items.
Zero-waste food stores began turning up in Europe in just the last 15 years. The success of stores like Germany’s Original Unverpackt, France’s Day By Day, Denmark’s LØS Market and the UK’s Bulk Market and Earth.Food.Love shows a strong proclivity, at least in Europe, for a green grocery experience.
Zero waste markets are a harder sell in the U.S., but that hasn’t stopped a few entrepreneurs from trying. The nation’s first zero waste grocery store, In.gredients in Austin, Texas, opened with fanfare in 2012 but had trouble competing with a nearby traditional grocery store—and finally shut its doors for good in April 2018. “We realized...we weren't changing shoppers’ habits,” Erica Howard Cormier, In.gredients’ former GM, told CNBC. “You have to plan a lot to go to the grocery store with your own containers, and people would go to the store across the street because they forgot their container.”
Nevertheless, others have ventured forth undaunted. Some of the biggest are Precycle and the Filling Station in New York City, Dill Pickle Co-op in Chicago, Simply Bulk Market and Zero Market in Colorado, the Refill Shoppe near Los Angeles, People’s Food Co-op in Portland, OR and Central Co-op in Seattle. And in Vancouver, BC is Nada, one of the biggest and most successful zero waste markets in the world. The store claims to have diverted some 30,500 containers from landfills since opening in 2014.
A search on the Litterless.com’s “Zero Waste Grocery Guide” turns up dozens of zero waste grocery options in most major U.S. metropolitan areas, even if some are smaller specialty stores or just sections in traditional markets. So grab a few tupperwares and that old college reunion tote bag and get shopping!
CONTACTS: Original Unverpackt, original-unverpackt.de; Day By Day, daybyday-shop.com; Bulk Market, bulkmarket.uk; LØS Market, www.loes-market.dk; Earth.Food.Love, thezerowasteshop.co.uk; The Bulk Market, www.bulkmarket.uk; Nude Foods, nudefoods.co.za; The Refill Shoppe, therefillshoppe.com; The Filling Station, tfsnyc.com; Simply Bulk Market, www.simplybulkmarket.com; The Zero Market, www.thezeromarket.com; Nada Grocery, www.nadagrocery.com; Literless’ Zero Waste Grocery Guide, litterless.com/wheretoshop.
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