SAN DIEGO — With high biodiversity and rich farmland, San Diego County is exploring ways to put the region’s land to use to cut carbon emissions. In an online public workshop Thursday, county officials explained ways to expand the use of wetlands, marshes, forests and agricultural lands to capture and store carbon through the county’s Regional Decarbonization Framework. The framework aims to coordinate local governments and public agencies to eliminate carbon emissions in San Diego County before mid-century in order to slow the effects of global warming and stabilize the climate. It’s separate…