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.
The digesting of food is more likely to cause methane than carbon dioxide. Carbon dioxide is liberated when dissolved food is used in biological processes at the cellular level as carbon compounds combine with oxygen to produce energy.