Salt residue piled up by Laguna Chaxa, Atacama Salt Flats, with snow-capped volcanoes, near San Pedro de Atacama, Chile, South America

A blood stained knife in a police evidence bag, United Kingdom, Europe

Women wearing no protection, spraying pesticide onto wheat crops near Hangang in northern China, Asia

Women wearing no protection, spraying pesticide onto wheat crops near Hangang in northern China, Asia

A woman wearing no protection, spraying pesticide onto wheat crops near Hangang in northern China, Asia

A woman wearing no protection, spraying pesticide onto wheat crops near Hangang in northern China, Asia

Cut canola harvest lines with blue sky, Blackie, Alberta, Canada

Hay bale in a cut field with long shadow at sunrise, Alberta, Canada

Agriculture - Field of wheat stubble being burned after the harvest to control diseases, reduce weed competition and to make the next planting easier. Volunteer fire fighters use the burning for training / near Williams, California, USA.

Agriculture - Grape powdery mildew (Uncinula necator), comparison of infected wine grapes (left) and healthy grapes (right).

Dramatic dark storm clouds over farmland; Imperial, Nebraska, United States of America

Hay bales in a cut field with long shadows at sunrise and blue sky, Alberta, Canada

Aerial view of stacked square hay bales in a cut field with long shadows, Alberta, Canada

Offloading a harvested canola crop with an auger into a grain wagon, Legal, Alberta, Canada

Agriculture - Rice stubble being burned after the crop has been harvested, a controversial practice. Growers burn fields to remove heavy crop residue so they can re-enter fields early the next spring to plant soybeans, and to control some rice diseases. E

Agriculture - A combine harvests wheat in late afternoon sunlight with a low angle view of the combine header/ Manitoba, Canada.

Twilight scene of combine unloading beans into grain truck during soybean harvest, near Nerstrand, Minnesota, United States of America

Harvested feed/grain corn in the back of a farm truck with a combine harvester in the background during the harvest, near Niverville, Manitoba, Canada

A combine harvester unloads soybeans into a grain wagon on the go during the harvest, near St. Adolphe, Manitoba, Canada

Feed/grain corn in the back of a grain wagon during the harvest, near Niverville, Manitoba, Canada

A farmer examines corn residue in front of a combine harvester with a tractor and grain wagon in the background, during the feed/grain corn harvest, near Niverville, Manitoba, Canada

A combine harvester full of feed/grain corn next to a farm truck loaded with the crop, during the harvest near Niverville, Manitoba, Canada

Tractor with air seeder in field with blue sky and hazy clouds, near Beiseker, Alberta, Canada

Tractor with air seeder, seeding a stubble field with blue sky and hazy clouds, near Beiseker, Alberta, Canada

Tractor with air seeder, seeding a stubble field with blue sky and hazy clouds, near Beiseker, Alberta, Canada

Back view of air seeder, seeding a stubble field with blue sky and hazy clouds, near Beiseker, Alberta, Canada

Grower (crop consultant) checks rotting corn crop debris in field of cotton stubble, England, Arkansas, United States of America

Crop consultant examines no till corn at approximately 8-10 leaf stage, growing on bedded land where previous crop of no till cotton was produced, England, Arkansas, United States of America

No till Roundup ready cotton in approximately 8-10 leaf stage with volunteer cotton, England, Arkansas, United States of America

Crop consultant checking progress on no till cotton, approximately 10-12 leaf stage, following previous year's crop of corn, England, Arkansas, United States of America

Crop consultant checking plants and conditions of farmland, no till cotton at the seedling stage where corn was previous crop, England, Arkansas, United States of America

GHANA Obsuas Ashante goldfields and mining residue.

Organic residue at Delray Beach

Bucket of honey extracted from the centrifuge poured into a sieve in order to eliminate part of the residue, around Cluny, France