yes
Yes. Every tree gives oxygen.
shoe tree
Yes, it is normal. The tree is decidious, meaning it loses its leaves.Please see related link below.
Is Epsom salt good for Tibichina Tree with a lot of flowers but drooping leaves?
The willow tree leaves do work just as good as the bark to make Aspirin. The leaves and bark are often combined to make medicine.
No. But if the tree needs pruning you should have that done at your expense as a gesture of being a good neighbor. If it is normal leaf-fall, the homeowner is responsible for their own maintenance.
Yes, the leaves are good for composting, and so are the limbs (preferably WITH bark) if you will grind them up.
Yes, trees are full of chloroplasts in their leaves.
A Tulip Tree has the largest leaves.
Oak tree leaves do not eat.
It is not a good idea to plant any deciuous tree near a pool as the leaves foul the water when they drop.
On a mature healthy tree there are about 200,00 leaves