Climate Action
Planetary Boundaries
Explore the concept of planetary boundaries, a scientific framework that identifies the environmental limits within which humanity can safely operate.
Course introduction
In this course, you will explore the concept of planetary boundaries, a scientific framework that identifies the environmental limits within which humanity can safely operate. You will learn how Earth’s systems function, why certain boundaries have been crossed, and what this means for the future of life on Earth.
What you will learn
Curriculum
6 modules · 22 lessons · 1 exam · about 24 min total
In this section, you will explore three planetary boundaries that directly shape the physical environment: climate change, land-system change, and ocean acidification. You will learn how each of these systems works, how they are being affected by human activity, and what is at risk when these boundaries are crossed.
In this section, you will examine three planetary boundaries that directly support life on Earth: freshwater use, biogeochemical flows (nitrogen and phosphorus cycles), and biosphere integrity. These systems regulate the availability of water, the fertility of ecosystems, and the balance of life on the planet.
In this section, you will examine the status of the planetary boundaries and reflect on what it means to live in a world where several have already been crossed. You’ll explore the consequences of operating outside Earth’s safe zone, as well as the opportunities for change.
The UN SDGs are 17 global goals for a fairer, sustainable world by 2030.
Learn moreProtecting Earth's Vital Ecosystems
The Planetary Boundaries framework highlights critical limits for Earth's life support systems. Understanding Goal 15, Life on Land, is crucial as human activities like deforestation and habitat destruction directly impact terrestrial ecosystems. This course helps you analyze how crossing these boundaries threatens biodiversity and stable land systems, emphasizing our role in maintaining a safe operating space for humanity. By learning about land-system change and biosphere integrity, you will grasp the severe consequences of exceeding Earth's capacity, directly contributing to Goal 15's aim for sustainable management of all terrestrial life.
Reviews
I found it to be one of the most eye-opening experiences I’ve had with online learning. Rather than treating Earth's limits as abstract scientific concepts, the challenge forced me to look at human impact through a deeply personal lens.
i never knew about this system, it was very interesting to learn about but also worrying to see the direction we all are heading in. I wish more people would care about our planet
Frequently Asked Questions
We are the leading online sustainability education platform. Our mission is to make sustainability knowledge accessible to everyone, by making it engaging to learn and genuinely rewarding to finish. People change what they do once they understand the world around them and the difference they can actually make.
It is genuinely free. You never pay to sign up, to take a course, or to receive your reward, and we never ask for a payment method. The rewards are funded by VeBetterDAO, an organisation distributing rewards to approved sustainability apps every week.
About 24 min of lessons, 22 lessons in total, plus a short exam at the end. There is no deadline and no fixed schedule: your progress saves automatically as you finish each lesson, so you can stop halfway through a module and continue later on any device. Access does not expire.
Yes, and you can check it yourself. Lessons are built on published evidence, peer-reviewed research, UN and government agency data, and public datasets. Factual claims carry numbered citations you can click through to the original source. Read our editorial policy for how we handle contested evidence and sponsored content.
With an email address, or with your Google, X or Microsoft account. Creating an account takes under a minute and puts you straight into the first lesson.
