Science and technology

Associated Press
In this photo taken on Friday, June 15, 2012, a pig eats from a trash-ridden creek that runs towards the conference center where the United Nations Conference on Sustainable Development, or Rio+20, takes place in Rio de Janeiro, Brazil. The throngs streaming into Rio for the Earth summit may be dreaming of white-sand beaches and clear, blue waters, but what they are first likely to notice as they leave the airport is not the salty tang of ocean in the breeze, but the stench of raw sewage. (AP Photo/Victor R. Caivano)

View gallery

500 photos

Astronomy, meteorology, environment, archaeology, electronics, computers and gadgets

View Comments (0)