Direct current is produced by batteries, fuel cells, rectifiers, and generators with commutators
Answer:
Fertilizers replace the nutrients that crops remove from the soil. Without the addition of fertilizers, crop yields and agricultural productivity would be significantly reduced. That's why mineral fertilizers are used to supplement the soil's nutrient stocks with minerals that can be quickly absorbed and used by crops
The answer is B because theorys explain what happens and why it happens.
Answer:
Use hcfc and no using (cfc).
One also can refuse using air corn and also car pole
Safe the electric or just us the solar energy.
Plant more tree and do 3 r
