Human life did not exist in the Americas until the land bridge between North America and Asia was formed during the Ice Age.
People from East Asia then followed their food source across the land bridge and settled in the Americas.
They eventually adapted and evolved, thus becoming what we know as Native Americans.
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Species become endangered for two main reasons: loss of habitat and loss of genetic variation. A loss of habitat can happen naturally. Dinosaurs, for instance, lost their habitat about 65 million years ago.
Answer:
Global Warming
Explanation:
It's the direct and indirect societal and environmental modifications caused by man in surroundings, mostly compacted by climatic changes the upper atmosphere and the depletion of basic life-supporting resources, global warming that creates huge changes in sea levels and which is said to impact the precipitation patterns around the world. Seasonal reverse in winds and the shifting of climatic regions further away from the center. The impact of extreme weather patterns on a large scale such as the heat waves and cold waves that cause large scale migration of human settlements. Rising regional imbalances from coastal areas to mountainous terrains. Rising temperature from 1 to 3 degrees increase in mean global temperature from 2007 to 2100 leading to drought and depletion of agricultural output. Increasing oceanic salinity and oceanic acidification.
Answer:
La opción correcta es C. Los lagos son ideales para la construcción de centrales hidroeléctricas.
Explanation:
Una central hidroeléctrica es una central eléctrica que utiliza agua corriente o que cae para poner una turbina en movimiento y generar electricidad a través de este. El uso de energía hidroeléctrica no produce contaminación ni residuos radiactivos peligrosos. Por eso se considera que las centrales hidroeléctricas generan energía verde.
En este contexto, los lagos son fundamentales para la construcción de las represas que almacenan el agua que se utiliza para hacer funcionar las centrales hidroeléctricas, ya que en el caso de los ríos, muchas veces ocurre que el ancho del caudal no es suficiente para poder realizar una construcción efectiva, con lo cual se construyen embalses artificiales que son un gasto extra de tiempo y dinero.
Due to it's great size, China is a land of contrast.