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.
For 27 years, the North Pond Hermit was to rural Maine what the Loch Ness Monster is to Scotland: lore, myth, legend, a perverse point of local pride. Those convinced of his existence regarded him with admiration and fear, the latter more common among his victims.