Importance and Value of Trees. Since the beginning, trees have furnished us with two of lifeâs essentials, food and oxygen. As we evolved, they provided additional necessities such as shelter, medicine, and tools. Today, their value continues to increase and more benefits of trees are being discovered as their role expands to satisfy the needs created by our modern lifestyles.
There are diseases that can be transferred to humans from psittacine birds, such as parrots and budgies, such as a viral infection. In addition, people can also show an allergic reaction to feathers and other bird products.
The announcement by British health authorities that bovine spongiform encephalopathy (BSE, pictured in medulla of cow, left), also known as mad cow disease, may have been transmitted to humans has led to a chaotic situation in the UK with ripple effects occurring throughout Europe and the rest of the world.