Reply The site of the proposed Lilac Hills Ranch development near Valley Center, which voters rejected in 2016 and the Board of Supervisors rejected again in 2020. (Photo: Jamie Scott Lyle/Voice of San Diego) January 13, 2021 There's this thing called carbon offsets, and San Diego County might not be able to make mandated greenhouse gas cuts without them, even though that very program is what tripped up its previous climate action plans. Subscribe The Board of Supervisors kicks off the effort to rewrite its plan on Wednesday with a Democrat majority for the first time in decades, a change environmentalists are giddy will lead to more progressive steps to address climate change. But politics won't change the physical challenges the county faces in curbing emissions locally.