Golf courses, despite occupying large green spaces, are not necessarily good for the environment. Land is often cleared to make way for a fairway and maintaining the pristine turf often requires a lot of water, regular mowing and the spraying of fertilizers and pesticides – none of which is good for biodiversity. In the US, with the number of course closures outweighing new openings every year since 2006, some are questioning how we should use these huge spaces – and asking whether, instead of golf, nature should be left to run its course. … Take San Geronimo, an 18-hole course in Northern California’s Marin County, located on two waterways, which are home to endangered coho salmon and steelhead trout.