By Steven Stone, Acting Director of the Office of Science – United Nations Environment Programme  This op-ed was originally published in Climate Home News.  In 1934, American economist Simon Kuznets presented a paper to Congress advocating for a new way of measuring economic performance.  The United States was reeling from the Great Depression, and Kuznets – a future Nobel Prize winner – wanted to gauge just how badly the country’s economy had been dented.  His metric, which would come to be known as gross domestic