Complex sentence: Part of the river, where it runs through Strathfield Golf Course, has had the concrete lining removed and the plants have returned and create an environment where the water is filtered and runs clean, and wildlife has returned.
Split into simpler sentences: Part of the river, where it runs through Strathfield Golf Course, has had the concrete lining removed. Here the plants have returned and have created an environment where the water is filtered and runs clean, and where wildlife has returned.