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.
(Walden, 3). With these words, Henry David Thoreau began the tale of his experiment of simple living at Walden Pond. Over the course of the next three hundred-odd pages, Thoreau outlined his philosophy of life, politics, and nature, laying the foundation for a secure place in the canon of great American writers.