78314document35149A grain of sand or a handful of dust.pdfapplication/pdf93727bcba0d3f48b7ca3e97034cb42eeMD5730912016-02-29 09:22:59https://pure.iiasa.ac.at/id/eprint/10404/1/A%20grain%20of%20sand%20or%20a%20handful%20of%20dust.pdf