Introduction:The typical definition of eutrophication is 'decrease in the levels of oxygen in the water bodies due to effects of excessive use of chemical fertilisers.' This statement clearly tells us all about the cause of the problem of eutrophication.
Oak is a common wood, yet many people arenât aware that there are two distinct species â red oak and white oak. Between the two, there are only subtle differences when it comes to durability, hardness, and cost. Color and grain pattern are the distinguishing features that set red oak and white oak apart.
This type of oak tree grows to between 70 and 90 feet tall and can have a trunk 2 to 3 feet wide. The northern red oak is a very valuable oak, with its wood used for such purposes as flooring. The tree also makes an excellent shade species. The tree's light red-brown heartwood gives it its name.