In some cultures, people are frugal while in others they tend to be generous. Some cultures favour meticulous planning while others favour living in the moment. Theories abound about how and why differences like these between cultures emerge and, increasingly, researchers are looking to the environments people live in for answers. In this episode, Mend Mariwany explores what role ecological factors, including the climate, play in shaping cultural norms and behaviour. Featuring Michael Varnum, associate professor of psychology at Arizona State University in the US.   This episode of The Conversation Weekly was written by Mend Mariwany, and produced by Mend Mariwany and Meher Batia with assistance from Katie Flood. Eloise Stevens does our sound design, and our theme music is by Neeta Sarl. The executive producer is Gemma Ware. Full credits available here. A transcript will be available shortly. Sign up to a free daily newsletter from The Conversation. Further reading and listening:Nearly 20% of the cultural differences between societies boil down to ecological factors – new researchWhy rice growers in China are more sexually liberal than wheat growersHow culture informs people’s emotional reaction to music – podcast Hosted on Acast. See acast.com/privacy for more information.