MATHIS WACKERNAGEL

MATHIS WACKERNAGEL

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Founder & President of Global Footprint Network
Winner of the World Sustainability Award · IAIA Global Environment Award

So shooting for one planet just means you would be totally dominant, and leave no space for other species. Ecologists say to maintain 85% of preindustrial biodiversity, it would take about at least half the planet left on its own. That would mean getting to half-planet. And now we use at least 1.75. I say at least because our assessments with about 15,000 data points per country in a year are based on UN statistics, and their demand side is probably an underestimate because not all demands are included. And also on the supply side or the regeneration side, the UN is very production oriented, so it's the FAO numbers, for example, look at agricultural production, and the depletion side or the destruction side is not factored in adequately. So that's why it's an underestimate. And still, it shows we use about 1.75 Earths, and that's more than three times half an Earth. So that's kind of the difference. But we also know overshoot will end one way or another. The question is do we choose to end it? Do we choose it by design, or do we let nature take the lead and end overshoot by disaster? So it's really ending overshoot by design or disaster. That's the big choice we need to make.

WALTER STAHEL

WALTER STAHEL

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Founding Father of the Circular Economy · Founder-Director of Product-Life Institute
Author of The Circular Economy: A User’s Guide.

The circularity, of course, has existed in nature for a long time. Actually, nature's circularity is by evolution. There is no plan, there is no liability, and there are no preferences. It's simply the cycles such as marine tides, CO2, and water cycles, plants and animals, and basically by evolution, the best solution wins. Also, there is no waste. Dead material becomes food for other animals or plants. Now, early mankind survived by depending on these local natural resources sharing a non-monetary chaotic symbiosis dominated by nature, then poverty or necessity-based society changed when humankind used science to overcome shortages of everything. In other words, the Anthropocene. With nuclear energy, petrochemicals, metal alloys, we became independent from nature, but we overlooked the fact that these new manmade anthropogenic resources or synthetic resources were unknown to nature, so nature could not deal with them. And that means that we, humankind, has to take responsibility for it.

JEFFREY D. SACHS

JEFFREY D. SACHS

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President of UN Sustainable Development Solutions Network
Director of Center for Sustainable Development, Columbia University

If we’re badly educated, we’re not going to make it on this planet. If I had to put my finger on one Sustainable Development Goal above all else, it is let’s empower young people so that they know the future. They know the world that they’re going to be leading soon. They can do something about it…If you’re in elementary school up to university, you should be learning–What is climate change? What is biodiversity? What can we do about it? And this kind of learning is not only book learning, but is also experiential learning.

PAULA PINHO

PAULA PINHO

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Director of Just Transition at the European Commission Directorate-General for Energy

She is responsible for Just Transition, Consumers, Energy Efficiency, Innovation and Energy security. She has been previously Head of Unit at the Directorate-General Energy in the European Commission. She was responsible for Energy Strategy and Policy coordination and then for Renewables and Energy System Integration Policy and Decarbonisation and Sustainability of Energy Sources. She was Acting Director for Energy Policy where she has overseen notably the work of international energy relations, financial instruments and inter-institutional relations.

KEVIN TRENBERTH

KEVIN TRENBERTH

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Nobel Prize-winning Climate Scientist · Lead Author of IPCC Assessment Reports
Author of The Changing Flow of Energy Through the Climate System

This is an intergenerational problem. The response to climate change relates very much to value systems. And one of the questions people ask, or should ask is: How much do you value the future generations? How much do you value the world that you're leaving your children and your grandchildren? And what kind of a climate you're leaving them with? And some people don't care, and some people don't have children. And they say, "Eh, it's not an issue for me. It's not one of my values." And so this is part of the problem, but if you're thinking about peoples as a whole, all of the community that you're leaving behind, this is a collective problem.

WILLIAM McDONOUGH

WILLIAM McDONOUGH

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Leader in Sustainable Design & Development
Architect, Co-author of Cradle to Cradle: Remaking the Way We Make Things

I think believing in something is also part of the responsibility of the believer to sift through these things. So there are a lot of people saying I'm green because they do something less badly. So for me, it’s not green yet, it's just less bad. It's not really good yet. It's not really fabulous, but that just means there's an opportunity to keep going to share information and help each other because in the end, I think what we're dealing with now is the recognition that the world has a very serious issue with climate, that's very clear now. So how can we help each other? The question is no longer what is wrong with the way you're doing it. The real question now is how can I help you?

BERTRAND PICCARD

BERTRAND PICCARD

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Psychiatrist, Explorer, Aviator of the First Round-the-World Solar-powered Flight
Founder and Chairman of Solar Impulse Foundation: 1000+ Profitable Climate Solutions
United Nations Goodwill Ambassador for the Environment

So this is why I prefer to speak with a really down to earth language. So maybe the people who love nature are going to say, “Oh, Bertrand Piccard, now he is too down to earth. He's speaking about profitable solutions. He's speaking to the industries that are polluting,” but we have to speak to the industries that are polluting and bring them profitable solutions, otherwise the world will never change, or humankind will never change. And don't forget one thing, what we are damaging is not the beauty of nature. What is being damaged is the quality of life of human beings on Earth because we can still have beautiful things to see, but if we have climate change, if we have tropical disease in Europe, if we have heat waves, floods, droughts, millions of climate refugees, life will be miserable, even if nature is still beautiful.

JENNIFER MORGAN

JENNIFER MORGAN

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Fmr. Executive Director of Greenpeace International
Special Envoy for International Climate Action · German Foreign Ministry

I have always hoped and dreamt to work with young people because I’ve always felt that it is their future. It’s so inspiring to be working with young people all around the world. I feel that we are in the midst of transformational change and that working together around these key moments where you can see those shifts happening – unimaginable things that you never thought were going to happen can happen. That would be my other advice to young activists that just when you aren’t expecting it, something will happen and you’ll be like, “I can’t believe they just decided that! Holy cow!” And then you’ve got to celebrate.