The document proposes a solution called "Fish & Green" to address Singapore's constraints of limited space by encouraging urban gardening. It involves a product that combines gardening and aquaculture in a small, self-cleaning system affordable for Singapore homes. If successful, it could help more residents grow plants and fish with minimal space and effort while reducing greenhouse gases and providing healthy, locally-grown food. Competitors offer similar combined gardening and aquaculture systems but Fish & Green aims to be more affordable and accessible.