Short answer - to breathe.
Long answer - the black streaks on the trunk of birch trees are called lenticels, and their function is to enable the exchange of gases between the tree and the air. So, in a way, this makes the whole process of photosynthesis a lot easier for birch trees.
Land use involves the management and modification of natural environment or wilderness into built environment such as settlements and semi-natural habitats such as arable fields, pastures, and managed woods. Land use by humans has a long history, first emerging more than 10 thousand years ago. It has been defined as "the purposes and activities through which people interact with land and terrestrial ecosystems and as "the total of arrangements, activities, and inputs that people undertake in a certain land type. Land use is one of the most important drivers of global environmental change.
<span>Not all plants use the C4 or CAM
pathways to avoid photorespiration because they require a lot of extra energy
to perform their function. In photosynthesis, minimizing water loss is essential;
C4 plants relocate the carbon dioxide to lessen photorespiration while CAM
plants indicates when to extract carbon dioxide. Their function is also related
to plants survival where C4 plants is usually a summer plant while CAM plants
is suited to thrive in desserts. Therefore, only plants that need special
requirement to survival use these pathways.</span>
My father is an architect wait I’ll ask him
