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.
Introduction - Henry David Thoreau Biography - Quotes Walden - Civil Disobedience Quotations - Links - Top of Page. Henry David Thoreau was born in Concord, Massachusetts in 1817. He graduated from Harvard in 1837, the same year he began his lifelong journal. Inspired by Ralph Waldo Emerson, Thoreau became a key member of the Transcendentalist movement that included Margaret Fuller and Bronson Alcott.