Scientist Carole Cheah releases beetles in Connecticut forests to combat invasive hemlock woolly adelgid.

State scientist Carole Cheah is releasing hundreds of beetles in Connecticut's forests to combat hemlock woolly adelgid, an invasive pest that kills eastern hemlock trees. The beetles are natural predators of the pest and could help save the trees from extinction. Cheah's initiative aims to protect both the forests' ecosystem and the local flora and fauna that rely on hemlock trees.