Complex sentence: It was built by British eco-pioneer Richart (or "Rishi") Sowa beginning in 1998; he filled nets with empty discarded plastic bottles to support a structure of plywood and bamboo, on which he poured sand and planted numerous plants, including mangroves.
Split into simpler sentences: It was built by British eco-pioneer Richart, or "Rishi", Sowa beginning in 1998. Sowa filled nets with empty discarded plastic bottles to support a structure of plywood and bamboo, on which he poured sand and planted numerous plants, including mangroves.