to complete, especially in the most remote areas. Introduction of cellphone service, on the other hand, is much cheaper and dramatically improves individual's ability to be economically productive, often in microbusinesses. It is estimated that 80% of the world's population is now located within range of cellular towers, 1.5 billion cellular phones are in use in developing countries and, in India alone, five million customers sign up for cellular service each week. The Four Asian Tigers—i.e., Hong Kong, Singapore, Taiwan, and South Korea—are a few of the countries that have leveraged technology to become a presence in the global community. Another example, led by Nicholas Negroponte of MIT's Media Lab in rural Asia, Latin America and Africa, provides $100 laptop computers to underdeveloped countries. Negative effects In 1905, the Journal of the American Medical Association published an article titled "Nervous Strain" about how "modern conveniences" make our lives busier and with less direct contact than the preceding generations. As an example, the author compared having a calming cup of tea with a person to the more distant practice of placing a telephone call. Labor-saving devices meant that people now spent more time sitting, breathed machine-generated smoke, and ate food, especially meat, fat and sugars, in greater abundance, changing peoples' diets. These activities were speculated to result in high blood pressure, obesity, and "nervous strain". Meat consumption Because of the enormous productivity growth in intensive agriculture and meat industry, meat has become a major part of the diet in most developed countries and is on the rise in developing countries. Red meat consumption has been linked to colon cancer; besides, growth hormone and antibiotics treatment of cattle and poultry has raised serious concerns about the adverse effects of those substances in industrially produced meat. Processed food and food preparation Processed foods, high-fructose corn syrup, and increased fat—the greater reliance on processed, packaged, microwaveable food has resulted in a rise in Type 2 diabetes, obesity, and other health concerns. Margarine, once seen as a great alternative to butter, does not help with absorption of nutrients and may contribute to heart disease. Other Styrofoam cups release styrene as the food or drink is consumed. Leaded fuel is another hazardous chemical. Although it has been outlawed in the United States, its use in developing countries impacts the health of local people and the global environment. See also Amish life in the modern world Appropriate