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   sci.environment      Discussions about the environment and ec      198,385 messages   

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   Message 198,289 of 198,385   
   De-Trois-Leaning to Ed P   
   =?UTF-8?Q?Re:_Mars_Has_an_Unexpected_Inf   
   13 Nov 24 11:15:34   
   
   XPost: alt.home.repair, rec.food.cooking, alt.global-warming   
   XPost: can.politics, aus.politics   
   From: dtl@invalid.net   
      
   Ed P wrote:   
   > What is the reaction of burning 100 million tons of fuel today?   
      
   Increased albedo leading soon enough to global cooling, rapidly.   
      
   > What  about all the trees cut down?   
      
   25% more vegetation exists as a direct complimentary partner to   
   increased C)2 production.   
      
   In essence the "green" Oxygen balance has improved.   
      
   https://science.nasa.gov/earth/climate-change/co2-is-making-eart   
   -greenerfor-now/   
      
   A quarter to half of Earth’s vegetated lands has shown significant   
   greening over the last 35 years largely due to rising levels of   
   atmospheric carbon dioxide, according to a new study published in the   
   journal Nature Climate Change on April 25.   
      
   An international team of 32 authors from 24 institutions in eight   
   countries led the effort, which involved using satellite data from   
   NASA’s Moderate Resolution Imaging Spectrometer and the National Oceanic   
   and Atmospheric Administration’s Advanced Very High Resolution   
   Radiometer instruments to help determine the leaf area index, or amount   
   of leaf cover, over the planet’s vegetated regions. The greening   
   represents an increase in leaves on plants and trees equivalent in area   
   to two times the continental United States.   
      
   Green leaves use energy from sunlight through photosynthesis to   
   chemically combine carbon dioxide drawn in from the air with water and   
   nutrients tapped from the ground to produce sugars, which are the main   
   source of food, fiber and fuel for life on Earth. Studies have shown   
   that increased concentrations of carbon dioxide increase photosynthesis,   
   spurring plant growth.   
      
   While rising carbon dioxide concentrations in the air can be beneficial   
   for plants, it is also the chief culprit of climate change. The gas,   
   which traps heat in Earth’s atmosphere, has been increasing since the   
   industrial age due to the burning of oil, gas, coal and wood for energy   
   and is continuing to reach concentrations not seen in at least 500,000   
   years. The impacts of climate change include global warming, rising sea   
   levels, melting glaciers and sea ice as well as more severe weather events.   
      
   Carbon dioxide fertilization isn’t the only cause of the increased plant   
   growth—nitrogen, land cover change and climate change by way of global   
   temperature, precipitation and sunlight changes all contribute to the   
   greening effect. To determine the extent of carbon dioxide’s   
   contribution, researchers ran the data for carbon dioxide and each of   
   the other variables in isolation through several computer models that   
   mimic the plant growth observed in the satellite data.   
      
   Results showed that carbon dioxide fertilization explains 70 percent of   
   the greening effect, said co-author Ranga Myneni, a professor in the   
   Department of Earth and Environment at Boston University. “The second   
   most important driver is nitrogen, at 9 percent. So we see what an   
   outsized role CO2 plays in this process.”   
      
   About 85 percent of Earth’s ice-free lands is covered by vegetation. The   
   area covered by all the green leaves on Earth is equal to, on average,   
   32 percent of Earth’s total surface area — oceans, lands and permanent   
   ice sheets combined. The extent of the greening over the past 35 years   
   “has the ability to fundamentally change the cycling of water and carbon   
   in the climate system,” said lead author Zaichun Zhu, a researcher from   
   Peking University, China, who did the first half of this study with   
   Myneni as a visiting scholar at Boston University.   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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