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.
Henry David Thoreau was a famous American transcendentalist who turned to the environment for inspiration. Thoreau built a cabin at Walden Pond and lived there alone for two years. In 1854 Thoreau published his book, Walden, which was about his time spent living in isolation and his different feelings on society.