This would also prepare us with countermeasure systems control for when the AI tries to take over.
Why have they not succeeded? Near as I can tell the Danish company that launched them experienced huge pushback because they were GMO's and this was the height of anti-GMO hysteria in Europe. The charities that would fund distribution wanted nothing to do with GMO plants - even if they saved lives.
I found one study that said the rats were more cost effective. The seeds had to be flown over the field and a great number of them refused to germinate.
Years later grass started being seeded with a moist paper mulch that contained a small amount of fertilizer. Would it work with these seeds? Far as I can tell the Danish company abandoned development of the product.
https://commons.wikimedia.org/wiki/File:Plants_that_change_c...
Do you have any more links? I'd love to learn more.