To offset the environmental impact of your travels, visit Viator.com. They’ve made a carbon-neutral commitment and have partnered with carbonfund.org to help you do the same. In honor of Earth Day, they’re hosting a writing contest. In 50 words or less, answer the question: Global warming: Imminent disaster or “my mountainside property will soon be ocean front … sweet!”? Make them laugh or cry for a chance to win 100,000 miles worth of carbon credits. Enter at travelblog.viator.com/earth-day-writing-contest.