Conservation

American Bird Conservancy
Armand Bayou Nature Center
Bayou Land Conservancy
Bayou Preservation Association
Big Thicket Association
Brays Bayou Association
Buffalo Bayou Partnership
Christmas Bay Foundation
Coastal Prairie Conservancy
Cypress Creek Flood Control Coalition
Extinction Rebellion Houston
Flower Garden Banks National Marine Sanctuary
Friends of Woodland Park
Galveston Bay Estuary Program
Galveston Island Nature Tourism Council
Galveston Ornithological Society
Greens Bayou Coalition
Gulf Coast Bird Observatory
Hermann Park Conservancy
Houston Arboretum & Nature Center
Houston Audubon
Houston Botanic Garden
Houston Humane Society Wildlife Center
Houston Parks and Recreation Department
Houston Parks Board
Houston Rabbit Resource
Houston Wilderness
Jesse H. Jones Park & Nature Center
Mercer Arboretum & Botanic Gardens
Native Plant Society of Texas Houston Chapter
Native Prairies Association of Texas
Save Buffalo Bayou
Texan By Nature
Texas Native Cats
US Fish & Wildlife Service
Wildlife Habitat Federation

Environmental Education

American Youthworks
EcoRise
Emerson Unitarian Universalist Church
Environmental Institute of Houston
First Unitarian Universalist Church of Houston
Houston Advanced Research Center
Nature Discovery Center
SPARK School Park Program
Stephen F Austin State University – Department of Sustainability
Student Conservation Association
The Children’s Museum of Houston’s EcoStation
The Woodlands G.R.E.E.N.
The Woods Project
University of Houston Downtown – Center for Urban Agriculture and Sustainability

Environmental Justice

Air Alliance Houston
Bayou City Waterkeeper
Center for Houston’s Future
Citizens Climate Lobby Houston Central Chapter
Citizens’ Climate Lobby 3rd Coast Region
Clean Water Action
Coalition for Environment Equity and Resilience (CEER)
Commission Shift
EarthShare of Texas
Environment Texas
Exploration Green Conservancy
Friends of Texas Wildlife
Galveston Bay Foundation
Greentown Labs
Houston-Galveston Area Council
Houston Peace and Justice Center
League of Women Voters
McMacCX
Mom’s Clean Air Force
Ocean Conservancy
Public Citizen Texas
Rice Environmental Analysis Program
Restorative Houston
Sierra Club Houston Regional Group
Texans for Clean Water 

Texas Association of Environmental Professionals
Texas Campaign for the Environment
Texas Community Watershed Partners 
White Oak Bayou Association

Community Gathering

Artist Boat
Buffalo Exchange
Central City Co-Op
Discovery Green Conservancy
NASA Johnson Space Center
Outdoor Nature Club
S.A.F.E. Diversity Communities

Infrastructure

American Institute of Chemical Engineers — South Texas Section
American Society of Heating, Refrigerating, and Air Conditioning Engineers
BikeHouston, Inc.
Blackwood Land Institute
Build A Better Planet
City of Houston Department of Solid Waste Management
City of Houston Green Building Resource Center
Cohousing Houston 
ESG Impacts
Finca Tres Robles
Houston Electric Auto Association
Houston METRO
Houston Renewable Energy Group (HREG)
Ivy Leaf Farms
Keep Houston Beautiful
Keep Kingwood Green
Organic Horticulture Benefits Alliance
Port Houston
Recipe for Success
Texas Health and Environment Alliance
U.S. Green Building Council – Greater Houston Area Chapter
Urban Harvest