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General Information TheHumanQuest.org is an independent educational website that publishes information about sustainability, planetary boundaries, Earth system science, climate change, biodiversity, environmental policy, natural…
About Us
Exploring Humanity’s Future on a Finite Planet Welcome to TheHumanQuest.org, an independent educational publication dedicated to one of the defining questions of our time:…
Production-Based vs Consumption-Based Emissions: 2022 Data and Trends
In 2022, global production-based CO2 emissions from fossil fuels and industry were 36.1 GtCO2, while consumption-based emissions were identical globally but varied by country…
The Nine Planetary Boundaries: Status, Thresholds and Interactions
Explore the status, scientific thresholds and interactions of the nine planetary boundaries defining Earth’s safe operating space.
Planetary Boundaries Explained: Earth’s Safe Operating Space for Humanity
Human civilization depends on more than economic growth, technological innovation, and political stability. It also depends on a functioning planet. Reliable rainfall supports agriculture.…
Criticisms and Limitations of the Planetary Boundaries Framework
The planetary boundaries framework identifies nine Earth-system processes and proposes quantitative limits to maintain a safe operating space for humanity. While influential in science…