There's not much you're able to do about breathing the environment, obviously, and if you do not grow your own food in the sterile greenhouse with 100% organic seeds, soil and 100% pure water, the meals problem is pretty challenging to fix. The one area you really have control over is the water you drink, shower in, cook with and use in your house.

The septic tank will first separates the waste water into three layers, top layer is named the scum layer which consists of oil and grease which floats to the top level, the next layer is known as waste water which can be basically water that can then exit via a T-shaped outlet pipe so it only release water to the drain field and the last layer will be the sludge which can be basically solids that have fallen on the bottom that will then be turned into sludge by some worthwhile bacteria that assists stop working the solid and turn into sludge.

And water, where do I commence with water. Our planet is a bit more than two-thirds covered with the wet stuff, so we still can not seem to find enough. We try to 'save water', or we 'conserve', but were still so wasteful. Next to oxygen, oahu is the one thing we should instead survive, and that we always mismanage our resources.

https://www.fluksaqua.com/en/