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The largest oil spill in fresh water was caused by a Shell Petroleum tanker in the Río de la Plata, off Magdalena, on January 15, 1999, polluting the environment, drinking water, and local wildlife.
The major environmental issues in Argentina are pollution and the loss of agricultural lands. The soil is threatened by erosion, salinization, and deforestation. Air pollution is also a problem due to chemical agents from industrial sources. The water supply is threatened by uncontrolled dumping of pesticides, hydrocarbons, and heavy metals. Argentina has a renewable water supply of 276 cubic km. In 2002, some 97% of all city dwellers and over 70% of rural dwellers had access to improved water sources. In 2000, about 12.7% of the land area contained forest and woodland.
According to a 2006 report issued by the International Union for Conservation of Nature and Natural Resources (IUCN), threatened species included 32 types of mammals, 55 species of birds, 5 types of reptiles, 30 species of amphibian, 12 species of fish, and 42 species of plants. Endangered species in Argentina include the ruddy-headed goose, Argentinean pampas deer, South Andean huemul, puna rhea, tundra peregrine falcon, black-fronted piping guan, glaucous macaw, spectacled caiman, the broad-nosed caiman, Lear’s macaw, the guayaquil great green macaw, and the American crocodile. W
Initiatives by topic
Ciclovía: Rosario was the first city in Argentina to hold an official Ciclovia, called Calle Recreativa. Each Sunday and holiday few important avenues of Rosario, are blocked off for the event to become carfree. From 8 am to 1 pm, runners, skaters and bicyclists take over the streets. Rosario's weekly ciclovías are used by approximately 30.000 thousand people on over 13 km of carfree streets. Buenos Aires started its Ciclovías network in 2009, and as of 2013 it covers more than 100 km and continues expanding. 
Buy Nothing Day: Dia sin compra
In 2003, about 6.6% of the total land area was protected. Argentina has four natural UNESCO World Heritage Sites: Los Glaciares, Iguazu National Park, Peninsula Valdes, and Ischigualasto/Talampaya National Parks. There are 14 sites designated as Ramsar Wetlands of International Importance. W
The National Parks of Argentina make up a network of 33 national parks in Argentina. The parks cover a very varied set of terrains and biotopes, from Baritú National Park on the northern border with Bolivia to Tierra del Fuego National Park in the far south of the continent. The Administración de Parques Nacionales (National Parks Administration) is the agency that preserves and manages these national parks along with Natural monuments and National Reserves within the country.
The headquarters of the National Parks Service are in downtown Buenos Aires, on Santa Fe Avenue. A library and information centre are open to the public. The administration also covers the national monuments, such as the Jaramillo Petrified Forest, and natural and educational reserves. W
Sustainable transport activism
2014 Sustainable Transport Award Finalist: Buenos Aires, Argentina itdp.org
News and comment
Buenos Aires, Argentina Wins 2014 Sustainable Transport Award, January 14 
Latin America: The Rapid Spread of Desertification,  November 4
DÍA MUNDIAL DE LA DESERTIFICACIÓN - 2009,  21 de junio