Composition of Earth's atmosphere by volume. The lower pie represents the trace gases that together compose about 0.038% of the atmosphere (0.043% with CO2 at 2014 concentration). The numbers are from a variety of years (mainly 1987, with CO2 and methane from 2009) and do not represent any single source.
User: How long did Thoreau live in the woods at Walden Pond? User: How long did Thoreau live in the woods at Walden Pond? Weegy: Thoreau lived in the woods at Walden Pond for two years, two months, and two days.
THOREAU'S EARLY YEARS. Henry Thoreau was born in 1817 in Concord, where his father, John, was a shopkeeper. John moved his family to Chelmsford and Boston, following business opportunities. In 1823 the family moved back to Concord where John established a pencil-making concern that eventually brought financial stability to the family.