A dengue fever outbreak has plagued Rio de Janeiro since January 2002. Dengue fever is a mosquito-borne disease. The elimination of standing water, which is a breeding ground for the mosquitoes, is a primary defense against mosquito-borne diseases like dengue. Removing such water remains a difficult problem in many urban regions.
The International Space Station astronauts took this image (ISS001-E-5418) of Rio de Janeiro in December 2000.
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This image originally appeared on the Earth Observatory. Click here to view the full, original record.