div class=ts-pagebuttonPage 1button div class=ts-image a href=https:reader040vdocumentssitereader040viewer2022020523575068521a28ab0f07af9f32html5page1jpg target=_blank amp-img class=ts-thumb alt=Page 1: A fifteen-year record of biotic metabolism in the Northern Hemisphere src=https:reader040vdocumentssitereader040viewer2022020523575068521a28ab0f07af9f32html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divp© 1975 Nature Publishing Grouppdivdiv class=ts-pagebuttonPage 2button div class=ts-image a href=https:reader040vdocumentssitereader040viewer2022020523575068521a28ab0f07af9f32html5page2jpg target=_blank amp-img class=ts-thumb alt=Page 2: A fifteen-year record of biotic metabolism in the Northern Hemisphere src=https:reader040vdocumentssitereader040viewer2022020523575068521a28ab0f07af9f32html5thumbnails2jpg width=142 height=106 layout=responsive amp-imga divp© 1975 Nature Publishing Grouppdivdiv class=ts-pagebuttonPage 3button div class=ts-image a href=https:reader040vdocumentssitereader040viewer2022020523575068521a28ab0f07af9f32html5page3jpg target=_blank amp-img class=ts-thumb alt=Page 3: A fifteen-year record of biotic metabolism in the Northern Hemisphere src=https:reader040vdocumentssitereader040viewer2022020523575068521a28ab0f07af9f32html5thumbnails3jpg width=142 height=106 layout=responsive amp-imga divp© 1975 Nature Publishing Grouppdiv