With the new American Express Green card you earn 3x points on travel by way of that you will earn 2 additional points (for a total of 3 points) for each dollar charged on eligible travel purchases.
For purposes of these bonus points, eligible travel includes: airfare, hotels, cruises, car rentals, campgrounds, trains, taxicabs, rideshare services, tours, ferries, tolls, parking, buses, subways, travel on third party travel websites, and on amextravel.com. Know that you will not earn additional points for purchases of timeshare properties.