Food production now contributes nearly one-third of global greenhouse gas emissions, with agriculture and land-use change driving much of the damage. Forests are cleared for cattle, and vast areas are transformed into chemically intensive, resource-heavy crop systems.

To be clear, there are many issues with the "food" industry, but when it comes to its role in climate change, fossil fuel use is not the biggest problem. If we include animal-based "food" production, then the climate impact is much greater than the "nearly one-third of global greenhouse gas emissions" quoted above.

A Critical Look at UN IPCC's Emissions Accounting

the facts