Fertiliser Graph Sources

Source: Planetary Boundary Reports

Rockstrom, Johan, et al. “Planetary boundaries: exploring the safe operating space for humanity.” Ecology and society 14 (2009)

Steffen, Will, et al. “Planetary boundaries: Guiding human development on a changing planet.” science 347.6223 (2015)

Richardson, Katherine, et al. “Earth beyond six of nine planetary boundaries.” Science advances 9.37 (2023)

Source: Global Nitrogen Production Numbers

FAO STAT Analytical Brief(s): Inorganic Fertilisers