"If you say, "I'm bursting with joy," a scientist could analyze your skin and find it loaded with neuropeptides that may have antidepressant effects and that may modulate the immune system. If you say, "I feel exhilarated, unbounded, and joyful," and I were to examine your blood, I would find high levels of interleukin and interferon, which are powerful anticancer drugs."

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Nature is often overlooked as a healing balm for the emotional hardships in a child's life. You'll likely never see a slick commercial for nature therapy, as you do for the latest antidepressant pharmaceuticals. But parents, educators, and health workers need to know what a useful antidote to emotional and physical stress nature can be. Especially now.

— Richard Louv