When I opened my eyes after my body scan and saw the perfect green leaves of the tree against the perfect blue of the sky, that was right. (mindbodygreen.com)
In a classic 1983 study, when leaves of some trees were damaged, their healthy neighbors emitted more phenolics and tannins — their natural insect repellents — in response, as if they themselves were under an attack. (discovermagazine.com)