What does Buddhism suggest we should do about suffering in the world?

Buddhism suggests two approaches to suffering:

1. Avoid suffering through a Soul-directed life based on The Noble Eightfold Path.
2. Do not contribute more to the considerable suffering of this world.

The Buddha set out the Noble Eightfold Path to teach us a way out of the unavoidable suffering that comes from being on the Physical Plane. If we follow his pointers, we will take ourselves out of the endless wheel of pain and loss.
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At the same time, we must live so as to create the least amount of suffering on this planet. That means having a kind and compassionate attitude toward all life forms. Sometimes we must kill plants and animals so that we can eat. In that case, an attitude of gratitude towards the being that gave its lifo for you is the empathetic approach and does the least amount of damage.