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...There are some obvious challenges. Power from coal-fired plants is cheaper. And the closest connection point to the national electricity grid is 500 km away. But Grove-White says geothermal power will become economic once coal and gas plants have to pay for their carbon emissions, which he expects to happen in an Australian carbon-trading scheme due to start in 2010. While the transmission lines will be expensive, their cost - $500 million or more - is included in the business model...
Financially, organic recycling is a no-brainer. It's cheaper in many areas to recycle food waste than to consign it to valuable landfill space, and the compost can be sold as organic fertilizer. (San Francisco brews a variety of compost recipes from its waste and sells them to more than 200 local vineyards.) But first you need to get citizens on board. In San Francisco, about half its residents participate in the curbside program, along with thousands of restaurants. The key is getting over what Robert Reed of Norcal Waste Systems calls the "ick factor"--the fear that leaving...
...uphill battle to stay trim. Like many Americans in rural areas, the poorer Oglala Sioux have far less access to fresh fruits and vegetables than those in more connected settlements. This means you're likely to be filling up on high-calorie, processed foods, especially since fatty foods are cheaper than healthy ones, and your family--like more than half the families on the reservation--is probably poor. What's more, the calories you consume stick around, since you're not doing much to burn them off. Your school is probably too far away for you to reach...
...just aren't available. Many obese children live in what are called nutritional deserts, where there are few nearby supermarkets offering the produce nutritionists recommend. Instead, families may rely on corner delis and bodegas, which tend to stock fattening, processed food, in part for economic reasons: processed foodstuffs are cheaper and can sit on shelves indefinitely. (Between 1989 and 2005 the real price of fruits and vegetables rose 74.6%, while the price of fats fell 26.5%.) Supermarkets, where better choices are found, are three times as common in neighborhoods that are in the highest quintile of income as they...
...Cheaper, Lighter, Better...