Ocean Acidification
Sources:
https://www.stockholmresilience.org/research/planetary-boundaries/planetary-boundaries/about-the-research/the-nine- planetary-boundaries.html
https://www.nationalgeographic.com/environment/oceans/critical-issues-ocean-acidification/
https://earthobservatory.nasa.gov/features/CarbonCycle/page4.php https://earthobservatory.nasa.gov/features/CarbonCycle/page5.php
https://www.designingbuildings.co.uk/wiki/Carbon_dioxide_in_construction