This harmonizes the whole environment. Basically, this is conservation of the environment, respecting the environment. That way, you balance your inner five elements and outer five elements. When we destroy the outer five elements, it also destroys our elements because they are interdependently related, connected. When you pollute the outside air, you still have to breathe in.
People have no wisdom.
They pollute the air, then they work on how to purify the air. In the first place, don't pollute the air. Then there's no need to work so hard. Actually, we are torturing ourselves. First we pollute the air, then we just fight, quarrel.