<Methane is produced by the rotting of organic material in reservoirs. The
massive amounts of methane produced by hydropower reservoirs in the tropics
mean that these dams can have a much higher warming impact than even the
dirtiest fossil fuel plants generating similar quantities of electricity.>
Relatively easy to skim the algae off and convert to Methanol/Ethanol/Urea by
Gasifying.MM
To: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Thu, 28 Jun 2007 15:03:53
+0200Subject: Re: [WaterWatch] Re: hydel power largest source of methane
emission
*Press Release*May 9, 2007*Contacts* * Patrick McCully, Executive Director,
IRN, Berkeley, California: +1 510 213 1441 (mobile) +1 510 848 1155
(office), [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> * Ivan Lima,
National Institute for Space Research, Brazil: + 55 67 9932-1897 (office)
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> * Tim Kingston, Communications
Manager, IRN, Berkeley, California: +1 510 290 7170 (mobile) +1 510 848
1155 (office), [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> Four Percent of
Global Warming Due to Dams, Says New ResearchLarge dams may be one of the
single most important contributors to global warming, releasing 104 million
metric tonnes of methane each year. This estimate was recently published in a
peer-reviewed journal by Ivan Lima and colleagues from Brazil's National
Institute for Space Research (INPE)."There is now more than enough evidence to
show that large dams are a major source of climate-changing pollution," says
Patrick McCully, Executive Director of International Rivers Network. "Climate
policy makers must address this issue."Lima’s calculations imply that the
world’s 52,000 large dams contribute more than 4% of the total warming impact
of human activities. They also imply that dam reservoirs are the largest single
source of human-caused methane emissions, contributing around a quarter of
these emissions.Methane is a more potent heat-trapping gas than carbon dioxide,
although it does not last as long in the atmosphere. One year’s large dam
methane emissions, as estimated by Lima, have a global warming impact over 20
years equivalent to that of 7.5 billion tonnes of carbon dioxide – higher than
annual carbon dioxide emissions from fossil fuel burning in the US.Lima and his
co-authors propose capturing methane in reservoirs and using it to fuel power
plants. Lima says, "If we can generate electricity from the huge amounts of
methane produced by existing tropical dams we can avoid the need to build new
dams with their associated human and environmental costs.""It is unfortunate
that Lima’s study has come too late to be included in the recent reports from
the Intergovernmental Panel on Climate Change," says Patrick McCully. "Partly
because of the influence of the hydro industry and its government backers,
climate policy-makers have largely overlooked the importance of dam-generated
methane. The IPCC urgently needs to address this issue."Methane is produced by
the rotting of organic material in reservoirs. The massive amounts of methane
produced by hydropower reservoirs in the tropics mean that these dams can have
a much higher warming impact than even the dirtiest fossil fuel plants
generating similar quantities of electricity.This is only the second estimate
published in the scientific literature of global greenhouse gas emissions from
dams. The previous estimate, published in 2000, which included only emissions
from reservoir surfaces, estimated global releases at 70 million tonnes of
methane and a billion tonnes of carbon dioxide.Lima’s calculations take account
of emissions from turbines and spillways and the rivers immediately downstream
of dams, in addition to reservoir surfaces. Lima’s paper does not address dam
emissions of carbon dioxide or another greenhouse gas, nitrous oxide.Lima has
also produced the first published estimates of methane emissions from dams at
the national level in Brazil, China and India. These estimates show dams in
Brazil and India are responsible for a fifth of these countries’ total global
warming impact. Dams in China are estimated to produce 1% of the country’s
climate pollution, although for methodological reasons this is likely an
underestimate.
--
Both ENDS
Nieuwe Keizersgracht 451018 VC AmsterdamThe NetherlandsT +31 (0)20 623 08 23F
+31 (0)20 620 80 49www.bothends.orgPlease consider the environment before
printing this e-mailvimal khawas wrote:
It would be very informative for all of us had mr
rohit attatched the documents/resesearch papers that
point out that hydel power emits mehane which emits
CHG four times that of carbon dioxide.
--- rohitpathania2k4 <[EMAIL PROTECTED]> wrote:
it is not true that hydel power is safe. They are
the largest sources
of methane emissions, whose GHG effect is four times
that of Carbon
dioxide. Add to it the change in the ecology because
of the large
scale submergence of land, vegetation, And what
about the large scale
displacements it causes without any form of
compensation existing in
our nation?
--- In [EMAIL PROTECTED], "surajcap"
<[EMAIL PROTECTED]> wrote:
Why, are they mad? No doubt they need
rehabilitation. But, hydel
power is much more safe than thermal power which
is the single
largest source (42%) of enviromental pollution and
degradation! We
should promote renewable energy sources like hydro
energy. Now
don't
say that we do not require electricity! We cannot
go back to stone
age and without it the author could not have
posted the mail via
internet.
--- In [EMAIL PROTECTED], "Souparna
Lahiri"
<souparna.lahiri@> wrote:
Dear All:
The members of the Affected Citizens of Teesta
(ACT) are on a
hunger tsrike
from today protesting against the destructive
hydel power
projects
in North
Sikkim.
They have created a wonderful blog with pictures
and information.
Please go to http://weepingsikkim.blogspot.com/
and join their
protests,
express solidarity.
--
Souparna Lahiri
143 Khirki Village
New Delhi - 110 017
Mobile: 91 9818147740
Tel (R) No. 91 11 29541502
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