ocr: Tourism is witzerland's third. largest industry. About 350,000 Swiss earn their living from it, andin1992 tourism accounted for 6% of GNP. The Alps are the main attraction, drawing winter and summer tourists from around the world. However, several factors have ledto the recent downturn in the industry. Warmer winters have resultedin a shorter skiing season. The rise : in value ofthe Swiss franc has made Switzerland an expensive destination, and Austria is offering tough competition.