If trees are essential for human survival because of the nutrients and gases they generate......?

Question

how many people can 1 tree sustain or alternatively how many trees are needed to keep 1 person alive?

Answer 1

I do not believe that has been calculated as it is incredibly variable based on the type of tree, age of the tree, time of year, location and lots of other factors. It can also not really be looked at like that unless you and tree are in a small closed system as you dont breathe the oxygen from the tree directly. all of the oxygen goes into the atmospheric pool from which we draw out breath. It can be said, however, that on average, one tree will produce around 260 pounds per year and two mature trees can supply enough oxygen for a family of four (into and out of the atmospheric pool of oxygen)

Answer 2

This is an how long is a piece of string question. In general the more trees we have the better, and the more of them en mass the more effect they can have.

Trees are largely regional and each variety will do best in its own climate zone

The human race has been doing a lot of deforestation for millenia and it is only recently now we can deforest an area the size of Wales a year that we are realizing we are not doing ourselves any favours,

Maybe you should rephrase your question to something like, 'How much oxygen is produced by ten hectares of forest? and as important, what is the evaporation rate?'

From that you may be able to deduce the production of an average tree and the volume of air needed to keep one person alive for one hour

For general information on the effect of plants on humans you could try approaching The Royal Botanical Gardens at Kew

Answer 3

If there is no tree or plants, how we are going to live in this beautiful planet
by producing chemically the oxygen (how many factories are we going to build), we can't race against nature
The simple Human or animal needs Oxygen for breathing
Trees needs Carbon-dioxide to breathe
if this goes smoothly we can live with nature together
if this breaks both will die, due to suffocation

Human is breathing air in whole of mixed air, our lungs separate the oxygen and takes it, by processing it it gives back it Carbon-dioxide and balance of the other gases

Calculation for human sustain in regarding with no of trees or viseversa is tedious process, insted we can grow more tree to make the world balance, (already there is shortage of oxygen in drastic percentages - research reveals that)

Trees are the best home for birds and small animals too, so din't cut trees insted we will grow more trees, save environment

Answer 4

How many resources does a person consume? eg ecological footprint.
all fossil fuels are derived from trees, so how many do we need to plant to replace them?

housing, furniture, clothing, books, government forms,
soil errosion management, flood/rainfall run-off management, shade, soil evaporation, local climate control.
Nuts, fruit, pharmacticals, animal fodder

Basically humans/human civilisation depend on a healthy environment, and trees are a key part of the planetary life support system.