Compost It! It Reduces Waste March 4, 2019 Email Napa residents threw out 10% less trash — and composted over 7,000 more tons of material — during the first four years of the food composting program. Thanks for helping reduce waste, decrease emissions and create local organic compost! But, we can do better. There are still thousands of tons of compostables going to the landfill. Join your neighbors and compost all your food scraps and soiled paper!