Nearly 900 million tourists worldwide hit the roads, skies and seas each year in pursuit of some R&R, and this takes a heavy toll on local ecosystems, water, air and wildlife. Being green this summer doesn’t require a complete lifestyle upheaval, though. There are tons of simple changes you can make to your summer vacation (or staycation!) plans. Alone, they may seem small, but these adjustments can collectively make an enormous impact on the environment.