When it comes to pesticide use in Marin, private citizens may be the biggest culprits, and a current campaign to curb that use just got a funding boost. Last year, the parks department received $100,000 from the county and $90,000 from the Environmental Protection Agency to develop the “Think Before You Spray” campaign to raise awareness of the impacts and alternatives to pesticide use in residential yards and gardens. The campaign included the formation of…