Ohio Environmental Council | 4,254 followers on LinkedIn. The mission of the Ohio Environmental Council is to secure healthy air, land, and water for all who call Ohio home. | The mission of the Ohio Environmental Council (OEC) is to secure healthy air, land, and water for all who call Ohio home. The OEC is Ohio’s leading advocate for fresh air, clean water, and sustainable land use. The OEC has a 50+ year history of innovation, pragmatism, and success.