School clubs could look to start a Meatless Mondays program at their school or students could advocate for more plants in their diets at home.
To extend the lesson for more advanced students, the global impacts of food production and agriculture can be explored in this interactive data resource and in this StC lesson plan about the impacts of food on the climate.
This resource is a simple (< 5 minute) survey that calculates your carbon, nitrogen, and water footprint based on the foods you eat in a given week. Your results are compared to the U.S. average and to an estimate of a sustainable diet. Although simple, this resource is a great introduction to one's personal dietary footprint, and thus this resource is recommended for teaching.
ESS3: Earth and Human Activity
8.ESS3.4 Construct an argument supported by evidence for how increases in human population and per-capita consumption of natural resources impact Earth’s systems.
Social Science Analysis (K-12)
4.24 Explain individual and cooperative approaches people have taken, or could take in the future, to address local, regional, and global problems as well as predict possible results of those actions.
6.27 Assess individual and collective capacities to take action to address local and regional issues, taking into account a range of possible levers of power, strategies, and potential outcomes.