Solar system

In a speech at 90^th science Congress, internationally acknowledged scientist and former Indian president Mr. APJ Abdul Kalam mentioned a very important aspect of mankind’s future energy crisis. He pointed out that the era of wood and bio-gas has almost come to an end. The age of oil and natural gas would soon be over within the next few decades. Massive burning of world’s coal reserves may lead to a worldwide ecological disaster because coal burning emits the highest amount of carbon in the atmosphere. Ukraine’s Chernobyl disaster in 1986 has exposed that nuclear energy can be potentially dangerous too. So according to Kalam, the only solution that mankind can look to is the massive use of solar energy in future because it has some advantages over other forms of renewable energies.

Now why has Kamal put so much importance to the issue of energy? The energy sources have always been a major factor of change throughout history. The world’s petroleum consumption has increased from annually 3 billion barrels in 1930 to annually 50 billion barrels today. In the next quarter century, the world’s population is expected to be about 8 billion which is 30 percent higher than today. Developing countries will grow their economics about two times faster than industrialized countries. Global economic growth is expected to continue at 3 percent per year. Consequently, the global demand for energy will grow at about 1.7 percent per year on an average. It indicates a 50 percent rise of energy consumption by 2030.If the world’s daily petroleum consumption is 220 million barrels now, it will to 335 million barrels by that time. The present reserve of hydro-carbon energy resources is limited and it will not be sufficient to meet the future energy challenges of the world. And hence, leading industrial counties have taken initiatives to tap alternative energy sources mainly known as green or renewable energy sources. The bottom line of Kalama’s speech indicates that concern of mankind in the 21^st the century.