Earth Day is here again and, for over 50 years, it has inspired people all over the world to go green. They believe that small eco-friendly decisions can add up to a huge difference to our planet and estimate they’ve prompted more than 2.5 billion green acts since their inception. With leaders in the travel industry taking major steps to reduce their carbon footprint, there has never been a better time to get involved. But how to start, especially when you’re watching your pennies? Rest assured, being a budget traveller doesn’t need to cost the earth and being eco-friendly doesn’t need to empty your wallet. Here are seven easy tips to make a real difference on your next holiday. A water filter could make you this happy too (probably). ©  Hero Images 1. Where to get your water There are still lots of places where it’s unsafe to drink tap…