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The Empire State Building, the world"s tallest for four decades and still the tallest in New York City, will buy 100% wind power from Texas-based Green Mountain Energy Company. "It was a natural fit for us to combine 100% clean energy with our nearly completed, groundbreaking energy efficiency retrofit work," Anthony E. Malkin, president of Malkin Holdings, which runs the building, said in the announcement. "Clean energy and our nearly 40% reduced consumption of watts gives us a competitive advantage in attracting the best credit tenants at the best rents."
The two-year contract for 55 million kilowatt hours of renewable energy annually will prevent nearly 100 million pounds of carbon dioxide emissions each year, according to Green Mountain. The company estimates the CO ₂ reduction is the equivalent of nearly every house in New York state turning off their lights for a week or planting nearly 150,000 trees—more than six times the number in Central Park.
As part of its green retrofit, the Empire State Building has hired Serious Materials to remove, retrofit and replace each of its 6,514 double-hung, dual-pane windows. It"s also adding insulation and other upgrades.

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帝国大厦，这座过去40年中的世界最高楼，如今依然是纽约的最高建筑，将向一家总部设在得克萨斯州的绿峰能源公司购买风能作为大......

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In my opinion, we are living on borrowed time. We have 3 or 4 days worth of food in the city. And if that food supply is disrupted, we ll be in a lot of trouble. We should have something in the city that replaces this very tenuous food supply and it should be growing in the city.The bulk of the world s population are going to be urban and are going to be living in high-rise accommodation. How do you make sustainable living solutions for the real worldBy the year 2050, over 3 4 of the world s population is expected to live in cities. The trend towards urbanization is greater now than at any time in history. And as population grows, it poses a unique problem: how best to grow food and supply it to the cities We are looking at the exciting and unconventional field of agriculture, that is vertical farming. It could radically change the view across the Thames here in London.

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Our hypothesis is that immigrants, who often do not speak the language and do not master the culture and norms of the host country, are concentrated in more manual-routine tasks (especially among less educated groups). The inflow of immigrants thus increases the supply of manual skills relative to the supply of abstract skills with two effects:●Due to the complementarity between these types of skills, the increase in the supply of manual tasks boosts relative compensation for complex skills, making them better paid.●Exploiting their comparative advantage, natives move to occupations requiring a relatively higher level of these skills.This positive reallocation and the complementarity of tasks can explain the lack of negative employment effects as well as the potential positive wage effects of immigration on native workers.So here s how it all shakes out. Low-skilled immigration reduces economic inequality when we set aside nationalist assumptions and focus on people instead of populations. Even if we cling to analytical and moral nationalism, low-skilled immigration doesn t happen to increase measured inequality. On the contrary, complementaries between the skills of migrant and native workers can leave natives better off than they would have been with less immigration.

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