September 2011 - Parks & Recreation - 21

B y t h e N umb e rs

Numbers to Live By
300,000: Deaths attributed to unhealthy
weight gain due to poor diet and lack of exercise
in the U.S. each year, according to the American
Academy of Allergy Asthma & Immunology

$76.6 billion: Amount of money

that could be saved on medical costs if all inactive
American adults became physically active, according
to the Department of Health and Human Services.

52:

Percentage of Americans who would like
to bike more if designated trails were available,
according to the Trails and Greenways Clearing House
in a 2008 survey. (Forty-six percent say they would
bike to work if they had trails to ride on.)

34.1 million: number

of Americans diagnosed
with asthma by a health
professional sometime during
their lifetimes.

8,000: Estimated number of premature

deaths attributed to excessive heat exposure
between 1979 and 2003 in the United States,
according to the Centers for Disease Control
and Prevention. (This figure exceeds the number
of mortalities resulting from hurricanes, lightning,
tornadoes, floods, and earthquakes combined.)

5-10:

The number of degrees Fahrenheit
by which a mature tree canopy can reduce air
temperature, according to the University of
Washington's Center for Urban Horticulture

$1.50-$3.00: Benefits accrued on

a per-tree basis for every dollar invested
in planting and maintaining trees and
vegetation, according to a 2005 urban
forestry study

68: The percentage of

Americans who are supplied
year-round by community
water systems that use surface
water.

19 million:

Pounds of pollutants
removed by trees each
year in Atlanta, according
to the U.S. Forest Service.

3: Watersheds supplying

New York City with clean
water (Croton, Catskill, and
Delaware).

$47 million:
Estimated economic
value of this pollutantremoval service to
Atlantans.

2,000:

square miles
of land purchased by New
York City in upstate New York
to protect source water.

Photos.com

22:

The number of
degrees (Fahrenheit)
that air temperatures in
cities, particularly after
sunset, can be warmer
than the air in neighboring,
less developed regions

	

3-8 billion:

Approximate number of dollars
this strategy has saved the
city in water treatment costs
and medical costs associated with
waterborne illnesses.

www.NRPA .ORG

SEPTEMBER 2011

Parks & Recreation	

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September 2011 - Parks & Recreation

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