The evergreen habit does have its disadvantages since premature leaf death caused by pollution, disease or insect attack can be 
(The evergreen habit; does have; its disadvantages) (premature leaf death; caused; by pollution, disease or insect attack) (premature leaf death caused by pollution, disease or insect attack; can be; )
The evergreen habit premature leaf death premature leaf death caused by pollution, disease or insect attack
does have caused can be
its disadvantages
by pollution, disease or insect attack