Govt vows free vaccine for all Forest is the fountain of youth. "Trees cast off years and grant health and cheer, or so transcendentalist" – Ralph Waldo Emerson claimed in his 1836 essay "Nature." "In the woods," he wrote, "I feel that nothing can befall me [. . .] which nature cannot repair." Well, truly said. Indeed, studies have shown how trees do really have healing powers. The release of phytoncides – antimicrobial essential oils – that protects trees from germs, have a host of health benefits for people, such as boosting immune system, reducing blood pressure, heart rate, stress, anxiety, improve sleep and creativity, and may even help fight cancer as well as depression.