Earth Day is April 22, and it’s a wonderful time to share stories of travel companies that are making the world we love to travel a better place.  For G Adventures, the focus is on trees. In the last 18 months, the tour operator has expanded its global Trees for Days initiative with seven new community partners. Its network now stands at 22 communities across multiple continents and benefits more than 200,000 local people.  And within the next month, the project will reach a milestone of 6 million trees!  The company points out that trees represent immediate and multi-layered climate solutions: one where tree growing does more than restore ecosystems, it helps rebuild…