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The Amazon Rainforest, often called the "lungs of the Earth," spans over 5.5 million square kilometres across nine South American nations and is home to an estimated 10% of all species on the planet. Scientists have long understood its critical role in regulating global climate: the forest absorbs roughly 2 billion tonnes of CO₂ annually, while also generating massive rainfall through transpiration.
However, decades of deforestation driven by agriculture, cattle ranching, and logging have pushed the Amazon to a dangerous tipping point. Researchers warn that if roughly 20–25% of the Amazon is lost, the forest could transition into a dry savanna — a process known as "dieback."
The Amazon Rainforest spans 5.5 million km² and absorbs 2 billion tonnes of CO₂ annually while hosting 10% of Earth's species. Decades of deforestation are pushing it toward a critical tipping point: losing 20–25% of cover could trigger irreversible "dieback," converting the ecosystem into savanna and collapsing regional rainfall. While conservation efforts including satellite monitoring and indigenous protections are underway, scientists warn that political will remains insufficient — and the window for meaningful intervention is rapidly closing.
f′(x) = limh→0 [ f(x+h) − f(x) ] / h
For f(x) = x²: f′(x) = 2x
Chain Rule: for g(f(x)), derivative = g′(f(x)) · f′(x).
Integration: ∫x² dx = x³/3 + C
A derivative tells you how fast something is changing at any instant — like a speedometer for a curve. The formula shrinks the gap between two points to zero to find the exact rate of change.
The Chain Rule handles nested functions. Integration reverses the process — finding total area under a curve, like calculating distance from a speed graph.
Regenerative braking is an electromechanical process that recovers kinetic energy during deceleration and converts it into electrical energy. In railway transport, the traction motor operates as a generator, producing an electromotive force proportional to its rotational speed. This energy can be stored in supercapacitors and reused during the next acceleration phase.
Le freinage régénératif est un procédé électromécanique qui récupère l'énergie cinétique lors de la décélération et la convertit en énergie électrique. Dans le transport ferroviaire, le moteur de traction fonctionne en génératrice, produisant une force électromotrice proportionnelle à sa vitesse de rotation. Cette énergie peut être stockée dans des supercondensateurs et réutilisée lors de la prochaine phase d'accélération.
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