Last year when I went to Disney, I had asked one of the cast members there and she said that she really wasnt sure but she thought there had to be over 50,000 people who work for disney. Walt Disney World Employees.
Methane is just used as a fuel for a gas turbine (can also be used to drive an internal combustion engine coupled to a generator). The turbine is coupled to a generator, which generates electricity.
Methane is produced when animals and plants decay. The greenhouse effect is the trapping or absorbing of heat energy in the atmosphere by the greenhouse gases and bouncing it back to earth. This level of greenhouse gases has increased in the last few years and the average temperature on earth has risen.