-
It is believed that paleoindians crossed Beringia (todays Bering Strait) from Siberia to North America. During the late Pleistocene Epoch, when the colder climate froze seawater in ice sheets around polar caps causing sea levels to drop,
-
live in small groups
usually nomadic
little relative impact
5-10 million people -
people started growing crops :D
less nomads and more livestock
only culture is native americans
started towns -
pilgrims land.
they brought crops and the plough
made more towns
forest devestation to build houses -
when coloniels arrived 1607 resources seemed never ending
they used as much as possible
high enviromental destruction
low pollution
near extinction of american bison -
switched from wood to fossil feuls
high pollution
bad working conditions
better medical practices
better farming and more people -
major conservationists is henry david thoreau, john muir, and theodor roosevelt
-
-
700 dead
-
government declares countries frontier closed
-
-
-
proposes global warming due to fossil feuls
-
sun powahhhhhhh
-
it was passed!!!!!!!!!
-
atom power
-
no mo toxic wata
-
a movement to reduce pollution and stop the degredation of habitats across the united states.
richard nixon creates the EPA and endangered species act in the 70s -
cuyshoga river catches fire.
-
promotes energy conservation
-
allowed hunters to more effectively kill animals, and posed a greater threat to all of the American Environment
