The most worrisome results of the large-scale clearing and cultivation of land include

The answer is erosion and soil degradation. It means its the wearing off the top soil by aspects of agriculture and cultivation also in addition by natural forces i.e wind and water. its an extremely slow process that may go unnoticed or it sometimes may occur at an alarming rate. Human activities are speeding up the process by 10-40 percent that may result in reduced crop production and lower surface water.

No because the eaeht is on a 23.5 degree axis tilt and so when it is winter the northern hemisphere is pointing away from the sun and the soutubern hemisphere is pointing toward the sun