Few people are of the view that is quite dangerous to work with pallets as they are toxic to the environment but it is not so if you use them safely and use the cleaned pallets they are not at all damaging the environment. I have plenty of experience with working with pallet wood and I cannot recall even a small such incident.
The most interesting thing is that you can make a complete house with pallets. This can be the best option for temporary residence and can be decorated by painting it in any color of your own choice. It gives such a good feeling to have a pallet house.