The cost of building a straw­bale home is lower than a traditional home.The materials—straw，sand and clay—are cheaper.

　　To build his home，Lung bought 250 bales at $2 a bale from a Meridian farmer.Lung is providing much of the labor himself and is using recycled materials，which brought the costs down to about $86 a square foot—he's spending about $165,000，not including land.

　　Building the 1,900­square­foot home with traditional materials would have cost Lung about MYM103 per square foot.

　　Lung is sharing his building experience with other builders，experts and students.He said that almost every day，curious visitors “come and ask about the house.” Lung gives them a tour and explains what he is building and why.

　　“However，straw­bale homes still haven't caught on with the mainstream，maybe because city codes have not been updated to allow them，” he said.

　　【语篇解读】 曾经的生态学教授用稻草建造了环保节能的房屋。

　　25．The advantage of Mark Lung's home is that________.

　　A．it has thin walls to save space

　　B．it can keep much fresh air in the house

　　C．it benefits the earth and costs less money

　　D．it is able to change temperatures more easily

　　答案　C　[细节理解题。根据文章第三段的straw­bale structures are earth­friendly and energy­efficient可知该房子的最大优点就是环保节能。故选C项。]

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