Canning novelty. Early methods of manufacture employed poisonous lead solder for sealing the cans. Studies in the 1980s attributed the lead from the cans as a factor in the disastrous outcome of the 1845 Franklin expedition to chart and navigate the Northwest Passage. Later studies found this to be false. Increasing mechanization of the canning process, coupled with a huge increase in urban populations across Europe, resulted in a rising demand for canned food. A number of inventions and improvements followed, and by the 1860s smaller machine-made steel cans were possible, and the time to cook food in sealed cans had
Environmental issues in Brazil a landfill in Nova Iguaçu (Rio de Janeiro area), methane is being collected and converted into electricity. This process is expected to eliminate 2.5 million tons of carbon dioxide emissions by 2012. According to data from the Brazilian Association of Public Cleaning and Special Waste Companies including sewage, Brazil is a leader in aluminum can recycling without government intervention with ten cans being recycled every year. In 2007, more than 96% of cans available in the market were recycled. This leadership comes from informal waste scavengers that make their living by collecting aluminum cans. However, recycling in general in Brazil