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The architecture of the server cluster is fully transparent to end users , and the users interact as if it were a single high-performance virtual server . Sophia Gordon ’ s carpet supplier , has developed an environmental plan of action that includes agreements with companies they have identified as sharing environmental concerns and who engage in recycling programs . These are critical parts of the " whole " person . Water shortages , lack of safe drinking water , water contamination , and groundwater depletion are some of the most serious environmental issues we are facing as a global community . Green tags , also known as Renewable Energy Credits ( RECs ) or Tradable Renewable Certificates ( TRCs ) , are a market mechanism that represent the environmental benefits associated generating electricity from renewable energy sources . I read children ’ s versions of classics from all over the world , but then , when I was in high school , I really discovered the pleasure of literature , as something that was very different from anything else — something that I felt a secret affinity with . One of the more popular is Audacity , a multi-platform tool that can record , edit and post-process audio .