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Beef produces 85 kg CO2e per kg of food. Tofu produces 2.9 kg CO2e per kg of food.
(ourworldindata.org)
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:
How much each change to the atmosphere has warmed the world:
Recommended actions to cut greenhouse gas emissions in the near future:
Anti-science, inactivism, and unsupported conspiracy theories are not ok here.
You should probably take into account beneficial and harmful effects of each food type as well (including externalities such as healthcare costs), although that would be an even more difficult task.