McDonalds is trying to implement all kinds of green programs.

Engaging employees, consumers on climate change. McDonald's Japan participates in the Japanese government’s Team Minus 6% program to reduce CO2 emissions by 1 kg per person, per day, by offering a discount to consumers who registered to participate in the program. During the 2007 campaign, McDonald's Japan helped raise the number of participants from 40,000 to 380,000.

I'm thinking if people just stop eating at McDonalds the global emissions would be drastically reduced

I don't know if McDonalds will ever turn green. The only thing green about them is their lettuce and that's pushing it.

Perhaps if they put methane collecting diapers on all their cattle farms (do they still use real cattle?) and use the methane to power their vehicle fleet and warehouse operations I could believe that McDonalds was going green. Or at the very least mounting small wind turbines on the behinds of every cow to harness the kinetic energy from when they "break wind". Otherwise it's a load of... bull.

HA!!! That was funny. It's theoretically possible though. Lots of methane there.