- Seemai karuvelam was introduced in Tamil Nadu in the 60's as fuel wood to help the people reeling under a drought situation. Karuvelam tree absorbs as much as four litres of water to produce one kg of biomass. The species is also known to germinate very fast and it spreads easily as a weed.
- It never shelters birds because they produce less oxygen but emits more carbon dioxide. It also affects soil nutrients. It makes it surrounding droughty.
- If there is no rain it starts absorbing underground water.
- If there is no underground water they absorb the humidity (the amount of water vapour in the air) from the air surrounding it. We never use these trees' products, moreover its roots change the ground water poisonous.
It is considered a noxious invader in Ethiopia, Hawaii, Sri Lanka, Jamaica, Middle East, India, Nigeria, Sudan, Somalia, Senegal and southern Africa
Its aggressive growth leads to a monoculture, denying native plants water and sunlight, and not providing food for native animals and cattle.
Its roots are able to grow to a great depth in search of water: in 1960, they were discovered at a depth of 53 meters (175 feet) at an open-pit mine near Tucson, Arizona,[4][5] putting them among the deepest known roots.



