Reducing food waste comes in at #3 of ways to reduce CO2, while switching to a plant based diet comes in at #4 [1]. That said, #3 is about agriculture/business waste of food, not what you and I are tossing from our plates.

> "A third of the food raised or prepared does not make it from farm or factory to fork"

Seriously though, the top thing in our control is eating plant based food!

1. https://www.drawdown.org/solutions-summary-by-rank