By Conor McGill To help ease congestion and protect the Lake Tahoe area, the environmental nonprofit Keep Tahoe Blue is encouraging visitors to leave their cars parked and use alternative transportation through its new Car-Free Tahoe campaign. Lake Tahoe welcomes nearly 15 million visitors each year, creating heavy traffic during the busy summer season, especially along the South Shore. “I even took a different road because I was like, I don’t w…