Global Warming To Deplete Great Lakes More - Report
US: May 29, 2008
CHICAGO - Global warming will likely drain more water from the Great Lakes
and pose added pollution threats to the region's vulnerable ecosystem,
environmental groups said in a report issued on Wednesday.
Climate change could further reduce scant ice cover observed in recent
winters, increasing evaporation rates and dropping water levels in the five
lakes that collectively make up 20 percent of the world's surface fresh
water.
Last year, Lake Superior water levels receded to their lowest in 77 years
before rebounding, and the report by the Healing Our Waters-Great Lakes
Coalition predicted global warming could lower lake levels by up to 3 feet
(1 meter) over the next century.
The lower levels will hamper lake shipping, expose polluted sediments, and
further damage water quality.
"Climate change is threatening the health of the Great Lakes and
jeopardizing efforts to restore them," the coalition's Jeff Skelding said in
a teleconference.
The coalition represents groups including zoos, fishing and hunting
interests, business organizations and environmental groups.
The report said global warming added to the urgent need for the US Congress
to act on more pieces of a $20 billion Great Lakes restoration plan,
proposed back in 2005.
Spending priorities are billions of dollars needed to repair antiquated
sewage treatment plants as well as cleaning up toxic sediments from past
pollution, restoring coastal wetlands that naturally cleanse pollutants and
stopping invasive species of fish, plants and mussels, the report said.
Scientists studying climate change have predicted more frequent droughts
that will hurt the lakes' coastal ecosystem coupled with more intense storms
that produce runoff containing toxic metals, viruses and other pollutants,
the report said.
THIRSTY WORLD
The report blamed warming temperatures for ruining ice fishing in many
areas, shortening the snowmobile season and harming Michigan's tart cherry
crop. Warming could expand or create new oxygen-depleted "dead zones" in the
lakes caused in part by uncontrolled algae growth and other processes.
"If Congress delays in acting to curb global warming and to restore the
lakes, the problems will only get worse and the solutions more costly,"
Skelding said.
Perhaps the most promising avenue for new funding is contained in a proposal
in Congress that calls for auctioning off permits to emit greenhouse gases
in a so-called cap-and-trade system. Proceeds from the auctions could
provide a stream of up to $3 billion a year for ecological restoration, said
Andy Buchsbaum of the National Wildlife Federation.
Meanwhile, eight US states and two Canadian provinces bordering the lakes
should enact a compact to prevent diversions of lake water to an
"increasingly thirsty world," Buchsbaum said. All but three states have
passed the compact, after which the federal governments of both countries
would be asked to ratify it.
(Editing by Michael Conlon and Cynthia Osterman)
Story by Andrew Stern
REUTERS NEWS SERVICE
|