Fair trade producers are those which

Those who grow export crops receive fair compensation for their work.

The fair trade producers is a movement that created a system which ensures that growers of export crops are compensated in a fair way for their products. The fair trade producers advocate the payment of higher prices along with better social and environmental standards to exporters in developing countries. The movement concentrates mainly on products that are usually exported from developing countries to developed countries.

Magma is outside the volcano  and lava is inside the volcano.