Advantages of using solar energy are pollution-free, noise-free, on installation it produces free energy, clean and renewable. Disadvantages include high cost, energy dependent on sunlight exposure, power stations are expensive to build and devices powered by solar energy cannot be used at night
<span>Not only does topsoil erosion lead to loss of soil fertility, it can also cause water pollution. Water pollution is a result of the downpour of the fertilizer chemicals to the water contaminating the water in terms of sulfur content, halogen content, and other possible metals.</span>
Renal medulla
The renal medulla contains the renal pyramids, where urine formation takes place. Urine passes from the renal pyramids into the renal pelvis. This funnel-shaped structure occupies the central cavity of each kidney and then narrows as it extends out to join the ureter.
