Increasing organic matter in our soils helps building healthy soils:
Increased soil organic matter also takes CO2 from the atmosphere and sequesters it in the soil, therby helping to reverse climate change. Wise use of compost and mulches helps to carbon farm.
Carbon farming found its roots right here in Marin County through the Marin Carbon Project
We can also do our part of carbon sequestration in the backyard. The same principals apply. Here is an educational article that will get you going.