In a time when technology is constantly progressing, there are more and more ways to be constantly updated about world events, social hardship and vanishing eco-systems. Unless you've got very green fingers or a lot money it can be difficult to imagine affecting such large-scale problems. However, gradual changes are being made and sustainable tourism is becoming the most popular way to see the planet. The key is to focus on making small positive differences and not expect to solve the world's problems on one volunteer project. Planting a few trees or teaching a child a few words of English may not seem like much on its own, but if everyone does their bit then all those little changes can make a big difference.

Can tourism help?
This may seem like an odd question, after all how can tourism be the answer when it is responsible for much of the damage? If the flow of travellers is a little more measured, it can actually have a very positive effect on a local area. The United Nations has declared tourism an important source of foreign exchange and employment in developing countries. Sounds complicated but what it means is that tourism can actually help bring money into countries where it's badly needed. What's more, an income from tourism gives people both the means and the incentive to further protect their area. Too many tourists can threaten the delicate balance though. In Machu Picchu and the Galapagos Islands for example, growing popularity brings with it a real threat to the eco-system. As long as a place doesn't get trampled under too many sturdy hiking boots and travellers act responsibly when they're there, tourism can be a positive thing.

A company to trust
Take time to do your research and there's no reason why you can't make a difference when you travel. If you're going to travel half way round the world you need to be sure that once you get there you will be working on a project that really needs your help. To get the most out of volunteering the most important thing to find out is the relationship between the sending agency and the local organisation. If there isn't a partnership between the two then you could end up on a project that local people don't need or want. Make sure the sending agency can tell you about the project you will be visiting and give a basic description of your tasks. A good company should help locate and deliver volunteers to worthwhile projects rather than set up their own to meet demand.

What can be done?
It makes sense that volunteers work that little harder and leave that little bit more satisfied when they choose to dedicate their time to something they really care about. It's important for volunteers to identify their passion and in what area they really want to make a difference.

• Teaching English
The British Council estimates that by 2010 around one third of the world will be learning English, and it's not difficult to see why. As an official 'international language' English is used important for business but it's also important for tourism. For people living in developing countries who want to take advantage of new opportunities then the ability to speak English is a key skill. Teaching English while you travel is your chance to directly improve the lives of dozens of people.

• Conservation
Some of the most beautiful parts of the world are also the most fragile and it's important that their beauty stays famous for the right reasons. Whether you are replanting trees, helping protect marine life or protecting local wildlife, conservation projects can definitely help to stem the tide of environmental damage. Charities like the WSPA are keenly aware of the need to protect animals when travelling and offer a lot of information for travellers. It's surprising how much difference can be made with nothing more than enthusiasm, local knowledge and a shovel!

• Working with people
The advantage of doing community work is that the difference you're making can be seen right in front of you. Whether it's the four walls going up on a building project, the smiles of children on a community project or the accurate shooting of the kids on your sports coaching project, it's an absolute certainty that a positive difference is being made.

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I'm totally passionate about travel, it's been my life and work for a good few years! My travel adventures haven't really been about seeing monuments etc but far more about people and getting off the beaten track. Even in a country that has large numbers of tourists you can still find hidden places if you look hard enough, living and working in country gives you such a different perception of it and more of a chance to absorb the local culture. I would like to share my many experiences and offer a little advice if I can to fellow travellers or anyone who is just about to set off on a life changing trip!