Select the TWO sentences that tell WHY people are often unaware of environmental changes. A
Most of us realize that our lives are lived on a scale that is insignificant
compared to geological time...
B
What many of us do not recognize is that, like the continents and the
mountains, the Earth's living ecosystems are undergoing constant changes as well.
с
While typically faster than the movement of continents, ecological change
occurs at a pace that can be difficult to detect over the span of a human
lifetime.
D
More recently, popular portrayals of the Lewis and Clark expedition have
shown Americans how dramatically the Great Plains have been changed
E
Many changes in the patterns of North American land forms and vegetation
have resulted from or been influenced heavily by human activities.
F
Throughout human history, each new generation has accepted the state of
the world that they inherited from their ancestors.