Editor's Note: It's Earth Week on the blog! In honor of the 40th Anniversary of Earth Day, The Window Seat editors are blogging about our favorite ways to go green while globetrotting. Ask us your eco-questions, join in the green conversation, and help us celebrate Mother Earth.

Earth Day’s 40th anniversary is April 22, and many travelers are wondering how to green their hotel stays. Many hotels claim be “green” properties, but all hotels are not created equal when it comes to sustainability practices. That said, there are easy ways to green your hotel stay without paying more or giving up the pampering you deserve on a vacation.

Know the facts: You’re not alone in your quest to make your hotel stay more eco friendly. In fact, in a Travelocity poll, 59 percent of customers stated a green rating would influence their hotel selection. And that green rating translates into real dollars for hotels: In 2010, bookings for green hotels are 65 percent higher than their non-green counterparts.

Start by consulting Travelocity’s Green Hotel Directory: Travelocity’s Travel for Good program adheres to the guidelines set forth by the GSTC, or Global Sustainable Tourism Criteria. This baseline for sustainable practices was developed by The Tourism Sustainability Council, a global coalition of UN bodies, research and academic institutions, social and environmental NGOs, certification programs, and sustainable travel providers.

Pick your brand carefully: While most major global hotel chains are working hard to green their operations, there are a few brands that are really taking a leadership position. Kimpton has just announced that all of its 50 properties nationwide are working hard to achieve Green Seal certification at the silver level and they have a comprehensive EarthCare program.

Marriott is also emerging as a green travel leader. They launched the Spirit to Preserve program, which is committed to saving the rainforest and offsetting the emissions of a stay at their properties. Approximately 275 of their hotels have achieved the EnergyStar label and 50 Marriott-branded hotels in design, development or under construction are expected to achieve LEED certification from the U.S. Green Building Council.

Score a deal: This is easy. In celebration of Earth Day’s 40th anniversary, Travelocity is putting more than 40 green hotels on sale with up to 40 percent off room rates. Here are a few examples:

Whistler, British Columbia: Fairmont Chateau Whistler from $148 / nt – 35 percent off.

Orlando, Florida: Lake Buena Vista Resort Village & Spa from $119/nt – 40 percent off.

Kauai, Hawaii: Grand Hyatt Kauai Resort & Spa from $320/nt – 43 percent off.

St. Lucia, U.S.V.I.: Marigot bay, St. Lucia from $258 / nt – 25 percent off.