Tag: maps.grida.no

Mercury pollution – transport and cycle

Mines use toxic chemicals including cyanide, mercury, and sulphuric acid, to separate metal from ore. The chemicals used in the processing are generally recycled, however residues may remain in the tailings, which in developing countries are often dumped directly into lakes or rivers with devastating consequences. The accidental spillage of processing chemicals can also have a serious impact on the environment. For example, at the Baia Mare mine in Romania cyanide is used to extract gold from slurry. In January 2000 a dam containing tens of thousands of tonnes of slurry burst, poisoning the local river with cyanide and heavy metals. Up to 100 tonnes of cyanide were released into the river, a tributary of the Danube. The drinking water supply for more than 2 million people was affected. Within hours, dead fi sh were seen washed up along the river.

Mercury pollution transport and cycle 768x650

Source: maps.grida.no

Different sources of danger and their impacts to the environment

 Contaminated groundwater can adversely affect animals, plants and humans if it is removed from the ground by manmade or natural processes. Depending on the geology of the area, groundwater may rise to the surface through springs or seeps, fl ow laterally into nearby rivers, streams, or ponds, or sink deeper into the earth. In many parts of the world, groundwater is pumped out of the ground to be used for drinking, bathing, other household uses, agriculture, and industry.

different sources of danger and their impacts to the environment 001

Source : maps.grida.no

Paper and paperboard production

Though it is based on wood, a natural renewable resource, the pulp and paper industry is one of the worst sources of pollution. It absorbs more than 40 per cent of all timber felled worldwide. Despite the development of digital communications tools global paper production is expected to increase by 2.2 per cent a year from 330 million tonnes at present to 440 million tonnes worldwide by 2015. The main growth areas are Asia and Eastern Europe, but annual per capita consumption in Western Europe is also expected to rise from 207 kilograms currently to 264 kilograms.

paper and paperboard production

Source : maps.grida.no