Bathroom Renovation

The bathroom is dated but functional so I've been shopping around for renovation ideas. The imaginary dream bathroom has a vanity and shower water collection pan which flushes used water through the toilet. There's a feature wall which pumps the water up to a waterfall and water runs onto a series of ledges with ever finer purifying stones, finishing on a ground level catchment of plants. The dream goes on. The reality is that my greenest option is to leave the bathroom as is (just replace the vanity which is the eyesore), which eliminates my need to consume new resources; and to remember that it's how I use the bathroom that makes tje difference.