GOOD TO OTHER LIVING BEINGS
Trees are associated with all the benefits that humans receive from nature. Their roots dig holes in the soil that help replenish water tables, their dead leaves feed soil organisms thereby boosting soil fertility, and so on.
GOOD TO THE CLIMATE
At the local level in the tropics, they act as a global air cooling system by preventing the sun from hitting the ground, while the immense quantities of water vapor that they reject in the air participate in the creation of clouds.
GOOD TO PEOPLE
Globally, 600 million people directly depend on trees to survive. But the whole humanity depends on them indirectly.