On October 2nd every year, caring people around the world get active to expose and memorialize the unnecessary suffering and slaughter of animals raised for food (www.WFAD.org). More than 55 billion land animals are killed each year for food worldwide. To increase profits, the majority of animals raised for meat, eggs, and dairy suffer routine abuse, mutilation, crowding, and severe confinement. This mass production of meat contributes substantially to greenhouse gas emission and global warming and the United Nations says it is the most serious challenge facing the human race. The UNs Food and Agriculture Organization has estimated that meat production accounts for nearly a fifth of global greenhouse gas emissions. These are generated during the production of animal feeds, for example, while ruminants, particularly cows, emit methane, which is 23 times more effective as a global warming agent than carbon dioxide. An article titled U.N. asks world to eat less meat by Juliette Jowit was published in DAWN of 07 September 2008. In this article, Dr. Rajendra Pachauri, Chair of the United Nations inter-governmental panel on Climate Change and Worlds leading authority on global warming has advised people to have one meat free day a week if they want to make a personal and effective sacrifice that would help tackle climate change. He has further stressed that people should then go on to reduce their meat consumption even further. By reducing meat consumption, we shall also reduce risks for obesity, heart disease, high blood pressure, diabetes mellitus, osteoporosis and some forms of cancer - particularly lung cancer and colon cancer. Meat eaters are at high risk of above diseases for animal products are high in sodium and have low amount of fiber. By reducing meat consumption, we can avoid world hunger and famine. The U.S. livestock population consumes enough grain and soybeans to feed more than five times the entire U.S. population. If Americans reduced their meat consumption by only 10 percent, it would free 12 million tons of grain annually for human consumption. That alone would be enough to adequately feed each of the 60 million people who starve to death each year. So let us make a start by observing 2nd October as a meatless day in order to bring awareness to the public regarding harmful effects of meat eating. ENGR. G.C. PINJANI, Karachi, October 1.