Tree Pruning & Thinning: The removal of dead, crossing, diseased, dying or weakly attached branches or limbs. Proper pruning and thinning can increase the amount of light that shines through a tree, allowing the process of photosynthesis to take place in foliage inside as well as outside the canopy of a tree. Proper pruning can help to invigorate a trees health and reduces the spread of infection, disease, and insect activity when branches or limbs are under attack. Tree Removal: This is usually the last and most evasive option when assessing the health of a tree that is in declining stages.