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.
The oak tree is prominent in religious texts and other mythologies. It is mentioned in ancient mythology, and in Celtic, Norse and Greek writings. Ancient kings wore crowns made from oak leaves to symbolize or represent Greek gods. Oak leaf crowns were also given to Roman commanders during victory parades. The United States, France, Germany, England, Poland and a number of other countries selected the oak tree as their national tree.