Riding on the laguna in Abidjan, Ivory Coast's economic hub, the unusual complex floats on a platform made from 700,000 discarded bottles and other buoyant debris.
They say the plan was drafted without consultation or proper studies being carried out.
With eco-tourism booming around the world, the canal cruises run by the Dutch group Plastic Whale are reeling in big business.
Rural Development Minister Ewon Benedick wants companies to allow rural folk to engage in eco-tourism on their land.
Native customary rights land at Kampung Kiau belongs to the villagers, says Sabah Rural Development Minister Ewon Benedick
Kedah MB Mukhriz says the idea came up after discussions with WWF and UNDP in New York.
Eco-tourism pioneer Anthony Wong says hoteliers are willing to buy from those adopting organic methods to grow rice and rear fish.
The districts of Kiulu, Ranau, Kadamaian and Tambunan are perfect eco-tourism getaways, says Sabah chief minister Musa Aman.