not quite to the most energy efficient building in the world and it's not that hard >> reporter: dennis hayes, the man who organized the first earth day, runs the bullet foundation >> we wanted to play a very big bet to show what was going on in green building wasn't going to achieve what was possible. we wanted to set a high bar that the theory being once it exists, it's possible. >> reporter: the concept here is bio- mimicry. build a building that operates like a plant. >> we tried to design this building as if it was an item using air and sun. >> reporter: a building that takes its queues from nature. >> there is the weather station over there and that's feeding information into our system. it is telling us the wind speed and the direction, it is raining and sunni. these are the solar panels. >> reporter: how much panels? >> 575 panels and they produce 232,000 kilowatt hours. >> reporter: the roof top array gives power to the city's utility grid in the summer and takes it back in the dreary north-west whippeder. it produces 60% more electricity every year than it uses. tenants who meet con

. >> dennis hayes, the man who organized the first earth day runs the nonprofit ecofriendly bullet foundatione wanted to place a very sharp bet that shows what is going on in green building doesn't begin to show what's possible. the theory that once it exists it's possible. >> the concept here is biomimiccary. build a building that operates like a plant. >> we tried design this building as if it were a doug fir tree. using the sun for energy, composting its waste. >> a building that takes its cues from nature. >> there's weather station, feeding information into our system, the wind speed, the wind direction, if it's raining or sunny. >> what do we have up here? >> there are panels grp how many panels? >> 575 panls they produce 232,000 kilowatt hours. >> the rooftop solar array, takes and gives. the building rouses 60% more electricity every year than it uses. tenants who meet conservation goals don't pay for power. >> it's totally aligned with who we are as a company. makes absolutely sense. >> the building is heated and cooled by a mixture of water and glycol. geothey are ma'am wells are dr