Khác biệt giữa bản sửa đổi của “Dấu chân sinh thái”

* {{chú thích tạp chí |author=Ohl, B., Wolf, S., & Anderson, W. |title=A modest proposal: global rationalization of ecological footprint to eliminate ecological debt |journal=Sustainability: Science, Practice, & Policy |volume=4 |issue=1 |pages=5–16 |year=2008 |url=http://ejournal.nbii.org/archives/vol4iss1/0707-016.ohl.html}}

==Liên kết ngoài==

*[http://www.footprintnetwork.org/gfn_sub.php?content=overshoot Earth Overshoot Day] Day on which humanity starts consuming more than nature can regenerate in that year.

*[http://myfootprint.org/ ''Myfootprint.org'']: Ecological Footprint Quiz by Center for Sustainable Economy - covers all countries and is not flash based