Word: blackness
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...this year's Black Friday began early, with many retailers pushing holiday ads while pumpkins and Halloween costumes were still on store shelves. Wal-Mart shot the first volley when it launched a price war last month with online retail giant Amazon.com over books. Walmart slashed the price on 10 of the most anticipated hardcover books to $10 a pop for shoppers who preordered the new releases through its website. When Amazon matched the price a few hours later, Walmart trimmed the price to $9 apiece and then $8.99. Rival Target, not to be left out, has since matched this...
Walmart didn't stop there. It unveiled plans to sell 100 toys for $10 apiece, roll back prices 20% to 30% on more than 100 other toys and aggressively mark down prices on DVDs, video games and other electronics even before Black Friday. Its push into electronics comes as the sector faces fewer competitors as a result of the demise of Circuit City and Tweeter over the past year. "We will not be beaten on price," said Eduardo Castro-Wright, vice chairman of Walmart Stores Inc., during the company's annual investor meeting last month. Anticipating a crush of early...
...biggest bargains and heaviest competition on Black Friday will be in electronics, where retailers such as Best Buy, Walmart and Target are gearing up to offer "door buster" sales for items ranging from flat-screen TVs, smart phones and home-theater systems to laptops and e-readers. Aside from those predawn door crashers, regular shoppers can expect discounts of up to 60% on certain products on Black Friday, says Vitelli...
That soupy brown air is the result of so-called black carbon expelled into the atmosphere in and around the Indian capital, from the burning of biomass for cookstoves and of black coal for electricity, and the incomplete combustion in the old diesel engines that propel most of the cars and trucks in the city. Breathing here isn't all that good for you - there's a reason the city is home to the "Delhi cough" - and now scientists are discovering that the sooty air isn't good for the climate either. According to some estimates, black carbon...
...Black carbon and CO2 each contribute to global warming in different ways. CO2 intensifies the greenhouse effect, allowing sunlight from space to enter through the atmosphere, then trapping the sun's energy as it bounces off the surface of the planet - like a greenhouse. (Of course, without some greenhouse warming, the earth would be a cold, dead place, but too much CO2 accelerates the effect and could make the earth too hot to be habitable. The temperature on Venus, for instance, where the atmosphere is 96% CO2, is over 400°C, or 750°F.) By contrast, black carbon...