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.
Some oak trees remain evergreen or nearly so, and frequently hail from warm, temperate regions with mild winters. Even evergreen oaks shed old leaves across the year, but younger leaves remain. Live oak, cork oak, canyon oak and Chinese evergreen oak are examples.