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NY Green Lights Clean Energy Projects, But Concerns Linger

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  • Cliff Krolick
    Posted April 21, 2022 at 10:18 pm

    The above is only half the story: NYC may be purchasing renewable energy from Canada to meet its GHG reductions but it has blood all over it. The scale of environmental damage is mind boggling and the scale of climate alterations is still ongoing. Details: HYDROELECTRIC ENERGY:  IT MAY BE RENEWABLE, BUT
    IS IT CLEAN AND CLIMATE FRIENDLY?

    Current evidence is mounting that evaporation, heat, and humidity all amount to increases in water vapor: a more potent Green House Gas (GHG) than most people are aware of.  While hydroelectricity is widely considered to be renewable, there is much more to the story. Not all reportedly “renewable energy” equates to being “clean energy” or is good for our climate.

    Based on scientific studies, dams and reservoirs emit large amounts of gases (GHGs).   https://www.nature.com/articles/s41561-021-00734-z . But dam facilities are not currently required to measure or report  GHG emissions. As a result, nearly all agencies, provinces, utilities, and other stakeholders overlook and ignore these GHG emissions. For example: “massive amounts of water evaporated annually from the reservoirs behind Hoover Dam in USA and the other dams on the Colorado River. One third of the river’s natural annual flow evaporated from the reservoirs and never reached the Gulf of Mexico”  [P. McCully, 1996 “ Silenced Rivers: The Ecology and Politics of Large dams”. This is a colossal amount of water vapor. 

    Dams and their draw down water containments(reservoirs) are interconnected and necessary components of most hydropower generation. Regulators and policymakers incorrectly assume that hydropower is a clean energy emitting zero carbon, when in fact mega and large hydropower reservoir facilities emit massive amounts of GHGs.  The decomposition process clearly gets extended for many more years due in part to the organic matter that is exposed to air for 6 months of the year.  As a result, decisions regarding climate policies and advancing a cleaner electric sector is based on misinformation and incomplete data regarding dams and reservoirs’ GHG emissions.  link.gale.com/apps/doc/A469848953/GRNR?u=maine&sid=bookmark-GRNR&xid=256a5582.
    
I.H.A.(International Hydroelectric Association) has, for the most part self regulated its’ operations and avoided realtime reporting.  So to speak:  “The fox is guarding the hen house”.  In addition, agencies typically fail to assess dams and reservoirs substantial GHG emissions when analyzing and approving new water supply management projects. (Dams). Bubbling waters: recent reports on methane emissions suggest that dams are anything but carbon-neutral, Earth Island Journal, Autumn 2007.
From Quebec in NorthEast Canada to B.C.in the northwest  then into Russian Siberia, there are over 20 mega dam/reservoirs and well more  25,000 large dam reservoirs and thousands of small dam reservoirs. Combined, these hydroelectric works operate 10’s of thousands of Sq.miles of shallow draw down reservoirs. Most of the dams were designed to completely block the flows of numerous rivers all summer.  These reservoirs flooded over some of the worlds’ most critical carbon sequestration sinks: boreal forests, peat bogs, tundra, and most troubling of all, permafrost which in melting releases lots of ancient Methane. Little if any clearing of forests and organic growth was initially done so the flooding reservoirs buried all this carbon in shallow decomposing graves, relentlessly degassing GHG’s.  
     ( https://e360.yale.edu/features/across-the-boreal-forest-scientists-track-warmings-toll)

    Scientific journals point to the late 1970’s when there was a noticeable increase in permafrost melting:
     https://www.academia.edu/317707/Evidence_and_implications_of_recent_climate_change_in_northern_Alaska_and_other_arctic_?email_work_card=title.  
    This corresponds with the beginning of major proliferation of dams both in Russian Siberia and Canadian Arctic.   Thermal contamination of water entering both the Kara and Labrador Seas in Arctic.

    I’m certain that over the past several decades Canada holds the title of being the world’s largest producer of GHG water vapor, Methane, and Co2 emissions from its’ many dams and reservoirs. In the 1950’s and 1960’s Russia dammed a number of rivers with sea-sized shallow reservoirs that changed the climate in those regions, including WARMING the Arctic ocean.  ( Steamy Relationships: How Atmospheric Water Vapor Supercharges Earth’s Greenhouse Effect by Alan Buis, NASA’s Jet Propulsion Laboratory, February 8, 2022) https://climate.nasa.gov/ask-nasa-climate/3143/steamy-relationships-how-atmospheric-water-vapor-supercharges-earths-greenhouse-effect/
    
This particular model of mega and large dam hydroelectric generation is very damaging both for generating extremely high levels of all the GHG’s including Methane, CO2, as well as Nitrous oxide and destroying ecosystems that have been in place for thousands of years. In addition, these shallow reservoirs remain stagnant and absorbing heat all summer, leading to extreme heat, humidity, evaporation, and melting permafrost throughout those regions and adding even more GHG emissions. Studies also show that GHG emissions are also greater in the winter months

    The warmed water is only released through the turbines to generate electricity in the winter. Now even greater emissions of GHG’s occurs as water is forced thru the turbines and out the dams at discharge rates 7-10 times greater than normal river flow. When this happens,  huge clouds of spray saturated with GHG’s enter the atmosphere.  Added to this, now these waters which are considerably warmer at (39 degrees) compared to air temps that could be from 0 to -20 degrees or so, eventually make their way into the Arctic Ocean and Labrador Sea, thus causing the Arctic to be as much as 8-10 degrees warmer than it should and leading to thermal corruption of the Arctic and its’ deep water currents. 

    Without removing many of these dams and letting the rivers flow freely, it may very well be that we will not be able to avoid the worst effects of Climate disruption.
    As members of the human race, we need to think hard about these dam projects.  If the science is telling us that our extreme efforts to harness our rivers for hydro-electricity are creating enormous climate issues, we need to think  about the moral  imperatives for our children’s future and shoulder some of responsibility to ACT and to ACT quickly.

    Cliff Krolick
    The Dam Truth Group
    [email protected]
    Parsonsfield, Maine
    Blog post
    https://cliffkrolick501c12.wixsite.com/the-dam-truth

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