A proposal to mine for titanium dioxide near the state's Okefenokee Swamp is attracting controversy. Alabama company Twin Pines has applied for a permit to extract minerals near the freshwater wetland and wildlife refuge — the largest blackwater wetland in North America — and residents, politicians and environmental advocates are pushing back to protect the Okefenokee. RELATED: New bill aims to protect Okefenokee Swamp from mining