1. Kolbert, Elizabeth (2014 ): The Sixth Extinction: An Unnatural History, Bloomsbury Publishing, S. 74 .

2. https://www.pbs.org/wgbh/evolution/extinction/dinosaurs/asteroid.html.

3. https://news.utexas.edu/2019 /09 /09 /rocks-at-asteroid-impact-site-record-first-day-of-dinosaur-extinction/.

4. https://www.nhm.ac.uk/discover/how-an-asteroid-caused-extinction-of-dinosaurs.html.

5. https://www.nhm.ac.uk/discover/why-are-birds-the-only-surviving-dinosaurs.html.

6. https://astronomy.com/news/2021 /03 /asteroid-dust-found-at-chicxulub-crater-confirms-cause-of-dinosaurs-extinction.

7. Wagler, Ron (2012 ): The Sixth Great Mass Extinction, Science Scope, März 2012 , Jg. 35 , Nr. 7 , S. 48 –55 .

8. Ebd., S. 50 .

9. https://www.worldometers.info/world-population.

10. https://livingplanet.panda.org/.

11. https://www.adventure-life.com/amazon/articles/about-rainforests-by-the-numbers.

12. https://www.regenwald-schuetzen.org/verbrauchertipps/soja-und-fleischkonsum/fleischkonsum-und-regenwald.

13. https://livingplanet.panda.org/.

14. https://earth.org/data_visualization/a-brief-history-of-co2 /.

15. https://climate.nasa.gov/climate_resources/24 /graphic-the-relentless-rise-of-carbon-dioxide/.

16. https://earth.org/data_visualization/a-brief-history-of-co2 /.

17. https://www.epa.gov/gmi/importance-methane.

18. https://www.ucdavis.edu/food/news/making-cattle-more-sustainable.

19. https://www.beefmarketcentral.com/story-world-cattle-inventory-country-usda-146 –106898 .

20. https://news.climate.columbia.edu/2017 /04 /04 /how-we-know-climate-change-is-not-natural/.