el flujo de energía a través de la biosfera es en un solo sentido. La energía radiante del sol es interceptada por la biosfera. Después de pasar a través de las transformaciones que mantienen vivos a los organismos retorna al espacio exterior en forma de calor. De esta manera no hay "ciclo de energía".
Fact one: Coal kills
Fact two: Politicians are cracking down
Fact three: Coal use is declining
Fact four: Coal is uneconomic
Fact five: Even coal miners are walking away
In 1836, a small group of Texans was defeated by Mexican General Santa Anna. ... Remembering how badly the Texans had been defeated at the Alamo, on April 21, 1836, Houston's army won a quick battle against the Mexican forces at San Jacinto and gained independence for Texas
The answer taught in schools is D.
