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FAQ
Earth Talk is a national syndicated column
that answers questions pertaining to the natural environment and how our
behaviors are impacting it. Earth Talk answers two new questions every week,
from the personal to the political.
Dear EarthTalk:
What is the status of bicycle use in the United States, compared to
other parts of the world like, say, China or Europe?
-- Monica Schmid, Seattle, WA
Given different types of weather and terrain--as well as historical economic
and developmental trends--comparing bicycle usage in different parts of the
world is tricky. What is clear, however, is that China dominates the world
bike scene: A whopping 60 percent of the world’s 1.6 billion bicycles are used
daily by some 500 million riders in China, who choose bikes over other modes
of transport over half the time.
Meanwhile, in Europe’s hotbed of commuter bicycling, Amsterdam, residents
choose their bikes 28 percent of the time, according to the International
Bicycle Fund (IBF). In other European cities, the stats are also impressive:
Commuters choose bikes 20 percent of the time in Denmark, 10 percent in
Germany, eight percent in the United Kingdom, and five percent in both France
and Italy. In stark contrast, the IBF reports that American city dwellers
choose bikes less than one percent of the time. Meanwhile, estimates of the
number of American adults who commute by bicycle regularly range from a low of
400,000 (based on U.S. Census data) to a high of five million (according to
the Bicycle Institute of America).
Unlike their American counterparts, Europe’s urban planners are working to
increase bicycle ridership, according to Janet Larsen of the Earth Policy
Institute, an environmental think tank. Copenhagen, for example, has 3,000
bicycles in the city, available for short-term use for a small fee. Amsterdam
provides covered bike parking at bus stops, encouraging both bike riding and
mass transit at the same time.
In Muenster, Germany, bus lanes can be used by bikes but not by cars. Special
lanes near intersections feed cyclists to a stop area ahead of cars, and an
advance green light for cyclists ensures that they get through the
intersection before cars behind them begin to move. Thanks to government
programs to ease traffic congestion in Germany, bicycle use has increased by
50 percent over the past 20 years. Meanwhile, the United Kingdom has developed
a plan to quadruple bicycle use by the year 2012. And in the European Union,
bicycles have been included for the first time in the comprehensive
transportation plan.
“European cities are much less suited to motoring and much more suited to
short-distance bicycle transportation than are American cities,” says
transportation analyst John Forester. He cites historical reasons, including
that European capitals were designed as walking cities served by rail, while
America instead embraced cars.
Unfortunately for the world’s air quality, a similar trend is developing in
China, where people are ever more turning to cars and abandoning their bikes.
Beijing, for instance, has been converting hundreds of bike lanes into car
lanes and parking areas, as a recent influx of motor vehicles is maxing out
existing roads. And with increased car traffic and fewer bike lanes, bicycle
riding is getting more hazardous. “Nowadays there are just too many accidents,
with a lot of cyclists getting hurt,” says Zhang Lihua of the China Cycling
Association. “Riding bicycles is becoming too inconvenient and too dangerous,”
he adds.
CONTACTS: International Bicycle Fund,
www.ibike.org, Earth Policy Institute,
www.earth-policy.org.
.JPG)
Dear EarthTalk: Can asphalt roof shingles be recycled?
-- Kate Prendergast, Warwick, NY
Asphalt shingles are the most common type of
roofing material used for residential homes today. In fact, the National
Association of Home Builders (NAHB) estimates that up to 60 percent of
dwellings use them. Each year, the re-roofing of homes in the U.S. generates
about 11 million tons of waste shingles--at a cost of more than $400 million
in disposal fees alone. Meanwhile, more than 60 manufacturing plants generate
up to one million tons of new material every year.
This enormous glut has led to the relatively
new practice of shingle recycling. Asphalt roofing shingles have great
recycling potential because they are easy to isolate. Shingles are then ground
into small pieces, and can then be reused in a variety of ways. Currently,
almost all recycled asphalt shingles are used in paving, because of the costs
savings they can yield. But they can also be used for new roofing and for fuel
oil, according to the California Integrated Waste Management Board.
The Construction Materials Recycling
Association has joined with the University of Florida, the National Roofing
Contractors Association and the U.S. Environmental Protection Agency on
shinglerecycling.org, a website that answers questions about how and where to
recycle asphalt roof shingles. Along with a wealth of other resources, the
site offers a state-by-state listing of environmental and permitting issues
related to asphalt shingle recycling, including how to deal with potential
asbestos content.
According to the Asphalt Roofing Manufacturing
Association, asphalt shingle recycling facilities are available in at least 15
states, including Florida, Georgia, Illinois, Indiana, Iowa, Maine, Maryland,
Michigan, Minnesota, New Hampshire, New Jersey, North Carolina, Ohio,
Pennsylvania and Washington.
For more information, NAHB publishes an
informative booklet entitled From Roofs to Roads: Recycling Asphalt Roof
Shingles into Paving Materials. Written primarily for waste generators,
processors and regulators, the booklet details potential end uses for recycled
shingles, summarizes the issues that recyclers face, and lists resources and
equipment manufacturers, including for equipment that enables demolition
companies to shred and prepare shingles for recycling themselves.
CONTACTS: California Integrated Waste
Management Board, www.ciwmb.ca.gov;
National Association of Home Builders,
www.nahbrc.org; shinglerecycling.org,
www.shinglerecycling.org; Asphalt Roofing Manufacturing Association,
www.asphaltroofing.org.
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