I suggest you do a 2 year study and report your findings:

Trends in Low-carb Consumption and Relative Human Flatulence in Regards to local Climate Change.

You could limit your statistical evidence and pair it with surveys and air samples to give it that all-important 'air' of technical accuracy. Throw in a few old restaurant menus, statistics for french fries and bread sales, compensate for population growth and you have yourself a study worthy of federal funding.

The scary thing is--it's probably no less valid or accurate science (and with as many unspoken variables) as is used to determine earth's pre-history CO2.

;-)