What methods control pollution at source? traps contaminants from runoff water. practicing conservation tillage prevent .

Practicing conservation tillage

Explanation:

Conservation tillage is an agriculture practice. In this the soil is plowed up and down so as to make the soil texture loose, removes the compaction of the soil, improves the water holding capacity of the soil so that the water instead of flowing over the surface get absorbed by the soil. This practice will reduce pollution of the water source as the soil will absorb the water no surface runoff of materials such as agricultural fertilizers and pesticides into the water source. Hence, the pollution will be prevented.

there really is life in the deepest part

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.