Thoreau: an American writer and naturalist who kept journals about his excursions into wild
nature throughout parts of the northeastern United States and Canada and at Walden Pond in
He sought self-sufficiency, a simple lifestyle, and a harmonious coexistence with
Audubon: John James Audubon (
) was an
. He painted, catalogued, and described the
. Almost from the beginning, Audubon set about to study American birds with the
goal of illustrating his findings in a more realistic manner than was common at the time.
began conducting the first known
on the continent: he tied yarn to the legs of
and determined that they returned to the same nesting spots year after year.
He also began drawing and painting birds, and recording their behavior
George Perkins Marsh:
a scientist and member of congress from Vermont, published Man and
Nature, which helped legislators and influential citizens see the need for resource conservation.
Marsh questioned the idea that the country’s resources were inexhaustible, used scientific studies
and case studies to show how the rise and fall of past civilizations were linked to the use nad
misuse of their resource base, and formulated basic resource conservation principles we still use
passed many acts that helped environment and used them to protect things
likes the Grand Canyon and oterh areas that would later become national parks.
He was a writer,
explorer, naturalist, avid birdwatcher, and 26th president of the united state.
He was the first
national political figure to bring the issues of conversation to the attention fo the American
According to many historians, he has contributed more than any other president to
natural resource conversation in United States.
Gifford Pinchot (
) was the first Chief of the
United States Forest Service
(1905–1910) and the
1935). He was a
Pinchot is known for reforming the management
and development of forests in the United States and for advocating the conservation of the
nation's reserves by planned use and renewal. He called it "the art of producing from the forest
whatever it can yield for the service of man." Pinchot coined the term
applied to natural resources.
geologist, explorer, naturalist.
He spent 6 years studying, writing jouranls, and
making sketches I nteh wilderness of California’s Yosemite Valley and then went on to explore
wilderness areas in Utah, Nevada, the Northwest, and Alaska.
He was largely responsible for
establisihng Yosemite National park in 1890.
He also founded the Sierra Club and spent 22
years lobbying actively for conversation laws.