Shibuya crossing through dirty windows by George Alexander Ishida | Flickr | CC BY 2.0

Interview with Paul Ehrlich: “Collapse of civilisation is a near certainty within decades”

Fifty years after the publication of his controversial book The Population Bomb, biologist Paul Ehrlich warns overpopulation […]

2 | 4 | 8 by LIZ | Flickr | CC BY 2.0

Optimum human population size

ABSTRACT: Although the tremendous size and rate of growth of the human population now influence virtually every aspect […]

Women gather to receive contraceptives in Malawi Photo by Lindsay Mgbor, Department for International Development | Flickr | CC BY-NC-ND 2.0

Return of the population growth factor –its impact on millennium development goals

A Report of the Hearings by the All Party Parliamentary Group on Population, Development and Reproductive Health. […]

Reducing human population would affect both supply and requirement of working hours. Punch Clock by Tom Blackwell | Flickr | CC BY-NC 2.0

How does human population affect society’s energetic metabolism

The energetic metabolism of societies and the degrowth paradigm: analyzing biophysical constraints and realities Sorman and Giampietro […]

Cheetah by Ryan Kilpatrick | Flickr | CC BY-ND 2.0

The importance of human reproductive health and rights for cheetah conservation

The Cheetah Conservation Fund joins the Population & Sustainability Network and Margaret Pyke Trust to share why […]

Paul R. Ehrlich | Wikimedia | CC BY-2.5

The Ecological Citizen, Interview with Paul Ehrlich

The Ecological Citizen editorial team interviews Paul R. Ehrlich on the extent his early research informed his views […]

Image from NASA Deep Space Climate Observatory

World Scientists’ Warning to Humanity: A Second Notice

“Twenty-five years ago, the Union of Concerned Scientists and more than 1700 independent scientists, including the majority of […]

Economy by  spDuchamp | Flickr | CC BY 2.0

Economic de-growth vs. steady-state economy

In this review of the concepts of economic de-growth and a steady-state economy, Kerschner concludes that the […]

Salton Sea Wasteland by Oliver.Dodd | Flickr | CC BY 2.0

An Ecolate View of the Human Predicament.

In a follow-up to his often cited article, Tragedy of the Commons, Hardin re-visits the central idea […]

Girls net fishing, Madagascar by Rod Waddington | Flickr | CC BY-SA 2.0

Modeling the Dynamics of the Integrated Earth System and the Value of Global Ecosystem Services Using the Gumbo Model

The authors developed a global unified metamodel of the biosphere (GUMBO) to simulate the integrated earth system […]