Products, such as Drano, are an easy fix way to clean clogged drain. However all drain cleaning products contain human-made chemical – sodium hydroxide. It is an irritant that can aggravate throat, nose, it could also damage skin, so contact with that chemical should be avoided.
And yes, there are more environment friendly ways to clean clogged drain. There are mechanical options available, you can use drain snake, plunger or elbow grease. Another environment friendly alternative is bio-drain cleaners. They contain natural bacterial/enzyme mix that helps to unclog drain and keeps it clean.
However the best practice is a good maintenance. Always make sure you don’t flash clogging elements down the pipe, flash drain with hot water and vinegar, install protecting screens to keep lint and hair out of the drain.
Expert Plumbing – Toronto Drain articles.