BMJ 2009; 338 doi: https://doi.org/10.1136/bmj.b158 (Published 05 February 2009)
Cite this as: BMJ 2009;338:b158
Correspondence to: A Burns alistair.burns@manchester.ac.uk
Identifying and quantifying planetary boundaries that must not be transgressed could help prevent human
activities from causing unacceptable environmental changes.
nature Vol 461|24 September 2009