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.

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.

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.