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A world without... sand

S1 E5
·
2013

Sand is all around us. It is the main ingredient of concrete and we use it to build our homes and urban infrastructures. It is in fact the second most exploited natural resource ahead of oil and natural gas. If sand seems to be an infinite resource, a tiny part of the sand found on our planet is exploitable. To obtain this resource, some beaches and rivers are destroyed and the effect on the environment is devastating. With the help of geologists, engineers and conservationists, we explain why sand is such an important part of our lives and how to protect this precious resource.

Levels:
Secondaire 9e année 10e année 11e année 12e année
Subjects:
Affaires et commerce Orientation et carrière Sciences et technologie Biologie Chimie Systèmes vivants Terre et espace Sciences humaines et sociales
Skills:
Citoyenneté mondiale et durabilité Innovation Pensée critique Résolution de problèmes
Themes:
Environnement et développement durable STIAM
French level:
C1 : Autonome C2 : Maîtrise
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E1 : A world without...satellites

53 min 23 s
Whether in our daily lives or across our economies, services provided by satellites have become ubiquitous. However, they remain fragile and vulnerable. Indeed, at any time, their activity can be affected by a breakdown, a collision, malicious interference, or even a solar flare. What would happen if the world was, one day, deprived…
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E2 : A world without... forests

53 min 38 s
In the face of direct and indirect human pressures, what will the forests of tomorrow look like? How much do we need them and what would a world without forests look like? Anthropogenic pressure on forests has never been so strong. Given the imminent dangers facing these ecosystems, what will they look like at the end of the century?…
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E3 : A world without... microbes

51 min 50 s
Ebola virus, H1N1, tuberculosis, cholera, botulism, listeriosis, malaria, nosocomial infections... For decades, viruses, bacteria, and other parasites have regularly made humanity tremble. Microbes are feared and fought relentlessly by the authorities and the scientific community. The objective: to defeat all these pathogenic micro…
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E4 : A world without... mosquitoes

53 min 12 s
It measures between 0.5 and 1.5 cm and weighs only a few milligrams, yet it is also the number one serial killer in the world. Every year, it is the macabre countdown... 7 million deaths per year and tens of millions of patients affected. The mosquito is one of the worst predators in the world.
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E5 : A world without... sand

50 min 45 s
Sand is all around us. It is the main ingredient of concrete and we use it to build our homes and urban infrastructures. It is in fact the second most exploited natural resource ahead of oil and natural gas. If sand seems to be an infinite resource, a tiny part of the sand found on our planet is exploitable. To obtain this resource,…
    Levels:
    Secondaire 9e année 10e année 11e année 12e année
    Subjects:
    Affaires et commerce Orientation et carrière Sciences et technologie Biologie Chimie Systèmes vivants Terre et espace Sciences humaines et sociales
    Skills:
    Citoyenneté mondiale et durabilité Innovation Pensée critique Résolution de problèmes
    Themes:
    Environnement et développement durable STIAM
    French level:
    C1 : Autonome C2 : Maîtrise