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  • Part of major Northeast highway shut down after fiery truck crash

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    03:12
  • Biden condemns violent protests on campuses

    02:07
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  • Suspected ISIS member lived freely in US for nearly two years after crossing border, officials say

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  • Blinken meets with hostage families and Netanyahu in Israel

    01:35
  • More protests and crackdowns on campuses nationwide

    02:50
  • Gunman prevented from entering Wisconsin middle school, police say 

    01:23
  • Arizona Senate votes to repeal restrictive abortion ban

    01:58
  • UCLA hit by violent confrontations between protest groups

    02:53
  • Some new NFL faces have never played competitive football

    01:30
  • In major shift, Biden Administration to change marijuana classification

    01:45

New revolution in the construction industry? Skyscrapers made of wood

02:39

Builders are increasingly turning away from concrete and steel in favor of wood. In some cases, the material – known as mass timber – is even being used to construct skyscrapers. It’s becoming a sort of revolution: a 2021 study in the journal Sustainability found that mass timber buildings could reduce a building’s carbon emissions 22 to 50 percent compared to concrete. However, environmentalists worry about the cutting of primary and older forests, which would substitute one type of high carbon building material for another.