I don’t think Koalas are bears.

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I just wonder if eucalyptus could become invasive, since it is not native. The fact that it is known to suck up water doesn’t sound good to me. We need water for plant life to stop the desertification of our planet. A native tree would probably work best.
I think it is invasive, taken over lots of California areas. But that was well before biologists were concerned about invasive species, and as mentioned it is a beautiful tree, gives shade, etc.
My mo-in-law in India had one in her yard, and she would put the leaves in her bath water. Great for colds and body aches. They eventually cut it down to do some more building, but left the stump, and for years (until her death) she could still pick the leaves from the twigs that grew out of the stump.
There is another invasive species I’m thinking that could help draw down carbon – but is it not carried by any vector, so it is just a matter of containing the perimeter. That is the MORINGA TREE. In its case the leaves and fruits can be used as food – which has a very high iron and calcium content, and helps produce much more milk in cows and lactating mothers. Native to India, it is now grown in many places for its food, esp Africa.
We have some in our backyard in S. Texas. It is an extremely soft “wood,” and grows some 30-40 feet high in a few years. If you cut it at the base, it just grows back. We had a killing freeze some years back and it died all the way down, then popped back up again in summer.
Scientists are experimenting with making biofuel from it. But I’m thinking it could also be used to make biochar thru pyrolysis, which could be used as a soil amendment for farmers and gardeners. In that way it would help draw down CO2 & store it in the soil for 100s or 1000s of years.