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, Henry David: Walden Pond hutÂ© Bettmann/CorbisEarly in the spring of 1845, Thoreau, then 27 years old, began to chop down tall pines with which to build the foundations of his home on the shores of Walden Pond. From the outset the move gave him profound satisfaction.