<p>You can never avoid pollution. Even sun exposure can be considered pollution due to the UV rays. It is pretty much all-pervasive in society today. Public utilities (Such as electricity and water) cause pollution that is absorbed by all the people that use their services. EM radiation for cell phones? That is also considered pollution. </p>
<p>It can’t be avoided. You can’t say the same of 2nd hand smoke.</p>