Scientific American: At the Cleveland Indians home opener on April 10 crowds can expect to hear super fan John Adams pound away on a bass drum in left center field as he has in virtually every home game since 1973. Over by the first base side of the field–and commanding a bit less attention–game- goers may also notice another distinguishing feature at Cleveland’s Progressive Field: an upper deck solar panel array. The Indians were the first American League team to install an alt-energy power source in 2007, …