Although I travel a lot and enjoy it to the core, I do understand that there are many downsides to it. Two things that bother me most are the environmental and cultural impacts. I came across this post by Nomadic Post which summarizes a few bad things about travel. It is something every traveller must be aware of.
Travel hurts the environment– Traveling is not the most eco-friendly of activities. Flying, cruising, eating out, driving around all have an negative impact on the environment. Most people when they travel constantly use towels in hotel rooms, leave the air conditioner going, or forget to turn off the lights. Jetsetting around the world in airplanes or driving around in an RV all contribute to global warming. Between waste, development, and pollution, we are doing exactly what The Beach said we would do- destroy the very paradise we seek.
Read Why travel is bad for the world by Nomadic Matt
On a related topic, also read my earlier post on travel and environment.