Providing an online and mobile hotel reservation system that eliminates the carbon footprint created by consumer trips, namely, measuring the carbon footprints of consumer trips and offsetting the carbon footprints by funding renewable energy and forestation projects; carbon calculation services for others, namely, measuring the carbon footprints of consumer trips and offsetting the carbon footprints by funding renewable energy and forestation projects; providing a web site featuring information on carbon emissions created by consumer travel; software as a service (SAAS) services featuring software for enabling consumers and businesses to calculate the carbon footprint of various types of travel and share images of carbon offset projects via social media; purchasing of carbon offsets for consumers and businesses to neutralize the environmental impact created by trips; providing a web site for booking eco-friendly lodging to offset carbon footprints created by travel; providing an online and mobile software platform for consumers and businesses to reserve hotel lodging, search hotel rates, and review and post ratings, reviews and recommendations on hotels