Answer:
Oil
Explanation:
Since, unlike oil, source like wind, solar, water etc. come naturally we don't and can't replace them but when the viscosity in oil has been used up it must be change to allow the proper functioning of the machine.
The most common pathogen then carry is protozoa , that causes malaria
<span> One is by titration, another is with a meter, and you can also measure it using colorimetric methods.</span>
Answer:
Something along the lines of burning the waste without the chemicals being released.
