blue-green vs ecological

blue-green

adj
  • Synonym of ecocapitalist; concerning ecocapitalism 

  • Of a color between blue and green; darker shades are called teal, lighter ones are cyan. 

ecological

adj
  • Relating to ecology, the interrelationships of organisms and their environment. 

  • Not harmful to the environment. 

How often have the words blue-green and ecological occurred in a corpus of books? (source: Google Ngram Viewer )