This implementation includes:

1. A map centered on East Africa with markers for coffee cooperatives, unions, and national bodies
2. Color-coded markers based on organization type (green for cooperatives, blue for unions, red for national bodies)
3. Marker clustering to handle the density of points
4. Popups for each cooperative with information and a button to fetch environmental data
5. Simulated environmental data fetching (NDVI/NDWI values) with risk classification
6. Layer controls to toggle NDVI and NDWI overlays from Copernicus Sentinel data
7. A legend explaining the marker colors

Note that the environmental data fetching is simulated for demonstration purposes. In a real implementation, you would need to make actual WMS requests to the Copernicus API using the provided base URL and layer names.