Cause: People live in a clean
And safe physical
environment
Effect:

There will be no pollution, no toxic sites, many diseases can be prevented, clean environment where you can work and play without worrying about getting infected by diseases etc

all soils contain mineral particles, organic matter, water and air the combinations determine the soil's properties – its texture, structure, porosity, chemistry and color. soil is made up of different-sized particles. sand particles tend to be the biggest.

which of what? i am confused