/19210/1.hassmallThumbnailVersion/Beyond%20emissions%20trading%20to%20a%20negative%20carbon%20economy%20a%20proposed%20carbon%20removal%20obligation%20and%20its%20implementation.pdf;/id/eprint/19210/1/Beyond%20emissions%20trading%20to%20a%20negative%20carbon%20economy%20a%20proposed%20carbon%20removal%20obligation%20and%20its%20implementation.pdf|/style/images/fileicons/text.png;/id/eprint/19210/2/tcpo_a_2276858_sm2059.docx