Human beings are able to live on earth simply because earth offers them enough food to live on. The plants, trees, flowers, crops, cereals and greens that grow on earth gives all the nutrients necessary for man to survive inclement weather and other challenges. Where there is still heavy rains, we have forest coverage which supports ‘water cycle’ and periodic rainfall. If forests are well-guarded from timber mafia and stupid people who fell them indiscriminately for fire wood, forests would pay back thousand times by pumping out oxygen and taking in carbon-di-oxide.
All of us know that they are free washermen of the air. Earth tries to grow drought-resistent plants and trees where rainfall is poor. With efficient water management. Nature would grow more food for us and nurture us and ensure the continuity of human race on this planet.