This book explains the notational system NUSAP (Numeral, Unit, Spread, Assessment, Pedigree) and applies it to several examples from the environmental sciences.

Beyond being the first substantial publication on Fourier, this work contains the text of Fourier's seminal paper of 1807 on the propagation of heat, marking the first time it has ever appeared in print.

Written at a level suitable for anyone with a basic background knowledge of biology and genetics, this book aims to provide an introduction to this crucial debate.