In recent years, experts have discovered more far-reaching effects of vitamin D deficiency. In 2009, researchers from the University of Missouri-Columbia found that insufficient levels of vitamin D are associated with inflammation, an immune system response that can cause fluid buildup and swelling.
1 of 19 Facebook Pinterest. Feeding birds comes naturally when you grow trees and shrubs with nutritious berries. The plants you'll find in this slideshow do double duty: They attract birds and create a beautiful display with their flowers, fall colors, and fruits adding sparkle to your landscape. 2 of 19 Facebook Pinterest.
Thorn Wound Dangers. With their sharpness and size, a hawthorn tree's thorns can cause serious wounds. When pruning, heavy gloves and goggles should be worn. There have been cases of eye scratches from the thorns that have led to blindness. Contact with thorns can also cause puncture wounds in the skin.