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.
20-30 years in captivity. Dorothy Richards had a beaver that lived over 20 years in an addition to her house. In most areas with predators and beaver trapping, they live 10 years or less. By water or land, and if by land, this is where much mortality occurs from predators, such as coyotes, and accidents.orothy Richards had a beaver that lived over 20 years in an addition to her house. In most areas with predators and beaver trapping, they live 10 years or less. By water or land, and if by land, this is where much mortality occurs from predators, such as coyotes, and accidents.