Better Aforestation

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The decision of the government to plant trees and shrubs between and across the roads in various cities like Noida, Bangalore etc is a highly appreciable action.

But the types of plants provided to the local authorities by the government are totally based only on availability and not much background research is done to maximize efficiency.


At which growth stage do trees produce the maximum oxygen (net after its own consumption):

Trees are living and need to breathe too. They breathe oxygen and give out carbon-dioxide like the rest of us. However, they also produce oxygen as a byproduct of photosynthesis. If the O2 produced by photosynthesis exceeds the oxygen consumed in respiration then this excess oxygen is released into atmosphere as free oxygen. So the answer to the above question is ironic because mature trees produce more oxygen than younger trees and hugely more than saplings. Since production of oxygen and the offset of net oxygen back into the atmosphere are two different things. 


Mature or old trees do NOT offset net oxygen back into the atmosphere:

For a tree to add oxygen into atmosphere, it needs to be growing or adding in mass. So a very large, even huge, tree that is mature will be consuming equally large quantity of oxygen as respiration. The Oxygen it makes through photosynthesis will be only just enough for its own respiration. It will sometimes be less than that — in which case it will actually be consuming more oxygen than it makes oxygen. The ratio of preexisting biomass to new biomass being added is different for a young tree compared to an old tree. The preexisting biomass of a larger tree adds respiratory burden.


 Fast growing plants, grass, saplings and young trees offset the most oxygen:

For every 100 kg of plant growth about 100 kg of oxygen is added back after subtracting respiration. This is our rough calculation. On the whole, younger land trees probably contribute to 5% or so of free atmospheric oxygen. The remaining land plants, grass, and saplings contribute to another 20%.

Hence the notion that only fully grown trees emit maximum oxygen is fundamentally wrong and what is more important is to keep on planting more trees 

A list of Indian trees, plants and shoots are made after considering various factors like

1)    Availability across all regions

2)    Cost of procurement

3)    Effectiveness

4)    Life span

5)    Maintenance requirements

Indian trees with the maximum oxygen emission and carbon absorption limits


1)    Neem

2)    Banyan

3)    Peepal

4)    Java plum (Jamun)

5)    Indian coral tree


Indian coral tree is a highly cost efficient and low maintenance requiring tree with optimal efficiency, but it is limited to a particular region.


Plants and shoots

1)    Aloe Vera

2)    Tulsi

3)    Areca Palm

4)    Sansevieria Trifasciata Zeylanica, Snake Plant

5)    Orchid

6)    Bamboo


It is scientifically proven that Aloe Vera and Tulsi are excellent pollution repellents. They also have medicinal qualities. This makes them the top choice for indoor gardening to maintain air quality.