In return they were allowed to plant crops for the first few years between the trees.

The region has seen its share of prosperity thanks not only to crops but also to oil.

Damage to buildings and crops were reported in the region.

And these people cannot move elsewhere or turn to alternative crops.

Once the land is cleared, it can be used to plant crops.

Even a difference of a few degrees can be crucial to crops.

The birds may also be responsible for some damage to crops.

The damage to crops has been estimated at $100 million and is likely to rise.

Damage to homes, crops and businesses is another matter - maybe $2 billion.

Some of these changes are harmful to human health, crops and ecosystems.