About 7.5 million people squeeze onto the increasingly arid hills of Rwanda, trying to eke out an existence on depleted soil.

Expansive and arid hills rise above the canyon on each bank.

Many young people have fled the arid hills, while those left behind struggle to raise a crop.

The beach extends for a mile of white coral sand and is framed beautifully by arid tree-covered hills.

Thanks to this effort, the gleaming white Tree of Science is surrounded by the deep green of the forest that replaced arid brown hills.

See to the south at the foot of those mountains a line of arid hills, down which a long train of mules is slowly moving.

On the arid hills nearby is a lighthouse which casts a beam over the town during the night.

For years, the farmers here struggled to coax wheat and corn to grow on these arid, rocky hills, but the land gave little in return.

A lazy river winds through the arid hills; llamas and sheep graze on alfalfa.

Jamie had spent long hours collecting rocks in the arid hills and arroyos.