Ohio PIRG Education Fund
As the average number of miles driven by Americans heads into its eighth year of decline, a new report from the Ohio PIRG Education Fund finds that the slowdown in driving is likely to continue. Baby boomers are moving out of the phase in their life when they do the most commuting, while driving-averse millennials move into that phase. These demographic changes will likely keep driving down for decades, according to the report, A New Direction: Our Changing Relationship with Driving and the Implications for America’s Future.
“The driving boom is over,” said Tabitha Woodruff, advocate for the Ohio PIRG Education Fund. “The constant increases we saw in driving up until 2004 show no sign of returning. As more and more millennials become adults, and their tendency to drive less becomes the norm, the reduction in driving will be even larger.”
Miles driven per capita peaked in 2004; the total number of miles driven by Americans peaked in 2007. The average American currently drives no more miles than at the end of President Clinton’s first term.
The millennial generation is leading the change in transportation trends. Sixteen to 34-year-olds drove a whopping 23 percent fewer miles on average in 2009 than in 200—the greatest decline in driving of any age group. In addition, millennials are more likely to want to live in urban and walkable neighborhoods and are more open to non-driving forms of transportation than the older generation of Americans.
“A preference for urban living, combined with the increasing viability of transportation alternatives, has meant that cars are no longer the automatic choice for young people,” said Mia Young, a senior at Oberlin College in Loraine County.
The report found that under any reasonable scenario, the number of miles driven annually will be far fewer in the future than if baby boom trends had continued. During the second half of the twentieth century low gas prices, rapid suburbanization and an ever-increasing number of women commuters entering the workforce fueled the driving boom. The factors that defined that period have since taken a back seat. Under some conservative scenarios outlined by the report, driving won’t ever regain its 2007 peak during the range of the study, which extends to 2040.
Yet, official forecasts of future vehicle travel continue to assume steady increases in driving, despite the changing trends seen over the past decade. Those forecasts are used to justify spending vast sums on new and expanded highways, even as repairs to existing roads and bridges remain neglected.
“Our transportation leaders need to wake up to the momentous changes that have taken place over the last decade,” said Woodruff. “The infrastructure we build today will mainly be used and paid for by the millennials who are leading the trend away from driving.”
The report examines a number of high-profile official transportation forecasts and finds a consistent pattern of overestimating how much Americans will drive and only partially revising those forecasts when they prove to be incorrect. The government forecasts examined all fall above even the most conservative scenarios forecast in the report and all seem to be based on the assumption that the driving boom’s state of ongoing growth will last forever.
The change in driving trends will have huge implications for many aspects of Americans’ travel life:
• Coupled with improvements in fuel efficiency, reduced driving means Americans will use about half as much gasoline and other fuels in 2040 than they use today, making the real value of gas taxes fall as much as 74 percent. Gas taxes provide the chief source of federal transportation funds and a major source for many states.
• Traffic congestion will be less of a problem.
• Toll roads will be less financially viable.
• Many highway expansion projects will start to look like wasteful boondoggles.
• Forms of travel that are expanding in use, like public transit, will be a better investment.
“Given the magnitude of these trends and the implications for the future, we need to press the reset button on our transportation policy,” said Woodruff. “Public officials can’t just stay on the only course they’ve known. They need to learn from current trends to rethink whether it’s worth building all those extra highway miles that were planned based on an obsolete understanding of future driving trends.”
Visit EcoWatch’s HEALTH page for more related news on this topic.
Consumers may be happy, but climate change is making coffee farmers bitter. Diseases and pests are becoming more common and severe as temperatures rise. The fungal infection known as coffee leaf rust has devastated plantations in Central and South America. And while robusta crops tend to be more resistant, they need plenty of rain – a tall order as droughts proliferate.
The future for coffee farming looks difficult, if not bleak. But one of the more promising solutions involves developing new, more resilient coffee crops. Not only will these new coffees have to tolerate higher temperatures and less predictable rainfall, they'll also have to continue satisfying consumer expectations for taste and smell.
Finding this perfect combination of traits in a new species seemed remote. But in newly published research, my colleagues and I have revealed a little-known wild coffee species that could be the best candidate yet.
Coffee Farming in a Warming World
Coffea stenophylla was first described as a new species from Sierra Leone in 1834. It was farmed across the wetter parts of upper west Africa until the early 20th century, when it was replaced by the newly discovered and more productive robusta, and largely forgotten by the coffee industry. It continued to grow wild in the humid forests of Guinea, Sierra Leone and Ivory Coast, where it became threatened by deforestation.
At the end of 2018, we found stenophylla in Sierra Leone after searching for several years, but failed to find any trees in fruit until mid-2020, when a 10g sample was recovered for tasting.
Field botanists of the 19th century had long proclaimed the superior taste of stenophylla coffee, and also recorded its resistance to coffee leaf rust and drought. Those early tasters were often inexperienced though, and our expectations were low before the first tasting in the summer of 2020. That all changed once I'd sampled the first cup on a panel with five other coffee experts. Those first sips were revelatory: it was like expecting vinegar and getting champagne.
This initial tasting in London was followed by a thorough evaluation of the coffee's flavour in southern France, led by my research colleague Delpine Mieulet. Mieulet assembled 18 coffee connoisseurs for a blind taste test and they reported a complex profile for stenophylla coffee, with natural sweetness, medium-high acidity, fruitiness, and good body, as one would expect from high-quality arabica.
C. stenophylla growing in the wild, Ivory Coast. E. Couturon / IRD, Author provided
In fact, the coffee seemed very similar to arabica. At the London tasting, the Sierra Leone sample was compared to arabica from Rwanda. In the blind French tasting, most of the judges (81%) said stenophylla tasted like arabica, compared to 98% and 44% for the two arabica control samples, and 7% for a robusta sample.
The coffee tasting experts picked up on notes of peach, blackcurrant, mandarin, honey, light black tea, jasmine, chocolate, caramel and elderflower syrup. In essence, stenophylla coffee is delicious. And despite scoring highly for its similarity to arabica, the stenophylla coffee sample was identified as something entirely unique by 47% of the judges. That means there may be a new market niche for this rediscovered coffee to fill.
The taste testers approved of stenophylla's sweet and fruity flavour. CIRAD, Author provided
Breaking New Grounds
Until now, no other wild coffee species has come close to arabica for its superior taste. Scientifically, the results are compelling because we would simply not expect stenophylla to taste like arabica. These two species are not closely related, they originated on opposite sides of the African continent and the climates in which they grow are very different. They also look nothing alike: stenophylla has black fruit and more complex flowers while arabica cherries are red.
It was always assumed that high-quality coffee was the preserve of arabica – originally from the forests of Ethiopia and South Sudan – and particularly when grown at elevations above 1,500 metres, where the climate is cooler and the light is better.
Stenophylla coffee breaks these rules. Endemic to Guinea, Sierra Leone and Ivory Coast, stenophylla grows in hot conditions at low elevations. Specifically it grows at a mean annual temperature of 24.9°C – 1.9°C higher than robusta, and up to 6.8°C higher than arabica. Stenophylla also appears more tolerant of droughts, potentially capable of growing with less rainfall than arabica.
Robusta coffee can grow in similar conditions to stenophylla, but the price paid to farmers is roughly half that of arabica. Stenophylla coffee makes it possible to grow a superior tasting coffee in much warmer climates. And while stenophylla trees tend to produce less fruit than arabica, they still yield enough to be commercially viable.
The stenophylla harvest on Reunion Island. IRD / CIRAD, Author provided
To breed the coffee crop plants of the future, we need species with great flavour and high heat tolerance. Crossbreeding stenophylla with arabica or robusta could make both more resilient to climate change, and even improve their taste, particularly in the latter.
With stenophylla's rediscovery, the future of coffee just got a little brighter.
Aaron P Davis: Senior Research Leader, Plant Resources, Royal Botanic Gardens, Kew
Disclosure statement: Aaron P Davis receives funding from Darwin Initiative (UK).
Reposted with permission from The Conversation.