Since the early 19th century, a number of Latin American countries have had active interests in the Antarctic continent. These interests began to accelerate in the early 20th century, and during the 1930s and 1940s, Argentina and Chile formalized sovereignty claims to the Antarctic Peninsula region. These claims overlapped not only with each other, but also with Great Britain’s claim to the “Falkland Islands Dependencies.” The two Latin American claims tended to be framed in the language of anti-imperialism, and for a while at least the idea of a “South American Antarctica” emerged to suggest a common front against the British Empire. Rivalry between Argentina and Chile, however, remained strong, and the alliance against imperialism never developed into a lasting agreement. In 1959, Argentina and Chile joined with ten other nations—including Great Britain, the United States, and the Soviet Union—in signing the Antarctic Treaty. This Treaty suspended sovereignty claims and created a “continent dedicated to peace and science.” Following the ratification of the Treaty in 1961, Argentina and Chile lessened their hostility to the imperial strategy of using scientific research as a justification for political claims, and came to be enthusiastic members of what some outsiders labeled an “exclusive club.” During the 1980s and early 1990s, four other Latin American nations—Brazil, Uruguay, Peru, and Ecuador—became full members of the Antarctic Treaty, attracted, in part, by the prospect of sharing in a potential minerals bonanza in the southern continent. This expected economic boom never came, however, and instead the Antarctic continent became one of the most protected environments anywhere on the planet by the terms of the 1991 Madrid Environmental Protocol.
Before there was Mexico, there was oil. Millennia of organic matter that collapsed and liquefied into fossil fuel rested deep underground and underwater along the half-moon territorial formation that 19th-century geographers named the Mexican Gulf. Hidden by the lush tropical rainforests, marshes, and mangroves that occupied the landscape from the Pánuco River on the border between modern day Tamaulipas and Veracruz and the Bay of Campeche on the South, the oil seeped to the surface in small ponds, sometimes blackening the waters of streams and lagoons from Tabasco to the Huasteca. The human communities who inhabited that part of the globe thousands of years later knew about and utilized nature’s oozing sticky black tar.
The Olmec, who flourished in southern Veracruz from 1200 to 400
Aridity, a significant characteristic of the U.S.–Mexico borderlands, has affected water use patterns for different groups of people in this region for thousands of years. From indigenous groups to European invaders and colonizers to 20th- and 21st-century farmers, ranchers, and policy-makers in Mexico and the United States, controlling the area’s scarce water resources has been a vital concern for survival and economic success. Given that an international border divides the region, national-era relations between the United States and Mexico often have been marked by water issues and the development of water projects and policies. And on both sides of the border these projects and policies have caused environmental changes that merit attention. Much of that history revolves around agricultural development with the need to ensure steady sources of water for irrigation. But industry and urban areas have also been enormous consumers of scarce water resources in the region, issues that are discussed here.