Carbon Dioxide reading from NOAH's lab atop Mauna Loa on Big Island reached a new milestone: 400 parts per million. Initially chosen because of its sheer isolation,

elevation and quality of air, measurement and research first began on Mauna Loa in 1958 when carbon dioxide levels were at 313 parts per million.  What does that mean? It's a reminder of how fast humans are changing our atmosphere and a reminder of the importance and necissity of solar and photovoltaic energy. Read the article in its entirety at NPR

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