Bill Ryerson, Robert Walker, and Julia Whitty examine population’s complex, pervasive relationship to the most pressing issues of our time, including climate change, biodiversity losses, global equity and human rights. William Ryerson, PCI Population Fellow and President of Population Media Center, Robert Walker, Executive Vice President of The Population Institute and Julia Whitty, Environmental Correspondent for Mother Jones Magazine examine population’s complex, pervasive relationship to the most pressing issues of our time, including climate change, biodiversity losses, global equity and human rights.
Population 7 Billion: It’s Time to Talk – WEBCHAT
By William Ryerson, originally published by Energy Bulletin
October 19, 2011
Tags: Population
Related Articles
‘Let’s call it earth grief’: Naming pain and loss in the age of climate crisis
By Stephanie Klotz, Stephanie Klotz on Linkedin
For decades, climate professionals and the informed public have been living with the disturbing knowledge of what is coming. Now, as the impacts of climate predictions begin to come true, we live with the devastating reality of what is happening, and we feel it deeply. This sorrow deserves a name.
July 10, 2026
A brief introduction to the bioregional movement and bioregional congressing
By Karie Crisp, Karie’s Substack
As climate disruption, biodiversity loss and political polarization deepen, a revived bioregional movement is emerging worldwide. This piece traces its roots and explores why place is becoming a source of resilience and belonging.
July 10, 2026
UN biodiversity pledge: Brazil’s strategy to protect nature and address climate change
By Daisy Dunne, Giuliana Viglione, Carbon Brief
The world’s most biodiverse nation, Brazil, has belatedly published its UN plan for halting and reversing nature decline by the end of this decade.
July 8, 2026





