However, some trees can be toxic to humans, such as poplars that emit extremely irritating pollen.
Trees have been a part of human culture since ancient times, when they were used for food, shelter, and more. Trees are also an important source of oxygen in the environment because they convert carbon dioxide into oxygen.
The tree is a perennial plant that grows from a single root, stems branch and produce leaves in the form of branches or twigs.
The tree is one of the most common plants found on Earth. It is hard to imagine what the Earth would look like without trees!
The tree is one of the most ancient organisms on Earth. Trees have been an integral part of human culture since the beginning of time. They are used in ceremonies, have profound meaning and symbolize life itself.
The tree is a common subject of paintings, drawings and other arts such as poetry and song lyrics. Trees lie at a crossroad between nature and the human world.