This text was adapted by The Saylor Foundation under a Creative Commons Attribution-NonCommercial-ShareAlike 0 License without attribution as requested by the work’s original creator or licensee. Preface


Ground Pollution and Hazardous Waste



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Ground Pollution and Hazardous Waste


Pollution of the air and water is an environmental danger, as we saw earlier, but so is pollution of the ground from hazardous waste. Hazardous wastes are unwanted materials or byproducts that are potentially toxic. If discarded improperly, they enter the ground and/or bodies of water and eventually make their way into the bodies of humans and other animals and/or harm natural vegetation.

http://images.flatworldknowledge.com/barkansoc/barkansoc-fig15_x015.jpg

Love Canal, an area in Niagara Falls, New York, was the site of chemical dumping that led to many birth defects and other health problems.

Image courtesy of US Environmental Protection Agency, http://commons.wikimedia.org/wiki/File:Love_Canal_protest.jpg.
Two major sources of hazardous waste exist: (1) commercial products such as pesticides, cleaning fluids, and certain paints, batteries, and electronics and (2) byproducts of industrial operations such as solvents and wastewater. Hazardous waste enters the environment through the careless actions of homeowners and other consumers, and also through the careless actions of major manufacturing corporations. It can cause birth defects, various chronic illnesses and conditions, and eventual death.

Sometimes companies have dumped so much hazardous waste into a specific location that they create hazardous waste sites. These sites are defined as parcels of land and water that have been contaminated by the dumping of dangerous chemicals into the ground by factories and other industrial operations. The most famous (or rather, infamous) hazardous waste site in the United States is undoubtedly Love Canal, an area in a corner of Niagara Falls, New York. During the 1940s and 1950s, a chemical company dumped 20,000 tons of toxic chemicals into the canal and then filled it in with dirt and sold it for development to the local school board. A school and more than eight hundred homes, many of them low income, were later built just near the site. The chemicals eventually leached into the groundwater, yards, and basements of the homes, reportedly causing birth defects and other health problems. (See .)




People Making a Difference


In Praise of Two Heroic Women

In the annals of activism against hazardous waste dumping, two women stand out for their contributions.

One was Lois Gibbs, who led a movement of residents of Love Canal to call attention to the dumping of hazardous waste in their neighborhood, as just discussed in the text. Gibbs had never been politically active before 1978, when evidence of the dumping first came to light. After reading a newspaper article about the dumping, she began a petition to shut down a local school that was next to the dump site. Her efforts generated a good deal of publicity and prompted state officials to perform environmental tests in the homes near the site. Two years later the federal government authorized funding to relocate 660 families from the dangerous area. Gibbs later wrote, “It will take a massive effort to move society from corporate domination, in which industry’s rights to pollute and damage health and the environment supersede the public’s right to live, work, and play in safety. This is a political fight. The science is already there, showing that people’s health is at risk. To win, we will need to keep building the movement, networking with one another, planning, strategizing, and moving forward. Our children’s futures, and those of their unborn children, are at stake.”

The second woman was Erin Brockovich, the subject of a 2000 film of that name starring Julia Roberts. Brockovich also was not politically active before she discovered hazardous waste dumping while she was working as a legal assistant for a small California law firm. As part of her work on a real estate case, she uncovered evidence that Pacific Gas & Electric had been dumping a toxic industrial solvent for thirty years into the water supply of the small town of Hinkley. Her investigation led to a lawsuit that ended in 1996 with the awarding of $333 million in damages to several hundred Hinkley residents.

Both Lois Gibbs and Erin Brockovich have remained active on behalf of environmental safety in the years since their celebrated initial efforts. They are two heroic women who have made a very significant difference.

Sources: Brockovich, 2010; Gibbs, 1998 [32]

The Superfund program of the US Environmental Protection Agency (EPA), begun about thirty years ago, monitors and cleans up hazardous waste sites throughout the country. Since its inception, the Superfund program has identified and taken steps to address more than 1,300 hazardous waste sites. About 11 million people live within one mile of one of these sites.


Oceans


The world’s oceans are at peril for several reasons, with “potentially dire impacts for hundreds of millions of people across the planet,” according to a news report (ScienceDaily, 2010). [33] A major reason is that overfishing of fish and mammals has dramatically reduced the supply of certain ocean animals. This reduction certainly makes it difficult for people to eat certain fishes at restaurants or buy them at supermarkets, but a far more important problem concerns the ocean food chain (Weise, 2011). [34] As the supply of various ocean animals has dwindled, the food supply for the larger ocean animals that eat these smaller animals has declined, putting the larger animals at risk. And as the number of these larger animals has declined, other animals that prey on these larger animals have had to turn to other food sources or not have enough to eat. This chain reaction in the ocean food chain has serious consequences for the ocean’s ecosystem.

One example of this chain reaction involves killer whales and sea otters in the ocean off of western Alaska (Weise, 2011). [35] Killer whales eat many things, but sea lions and harbor seals form a key part of their diet. However, the supply of these ocean mammals in western Alaska and elsewhere has decreased because of human overfishing of their prey fish species. In response, killer whales have been eating more sea otters, causing a 90 percent decline in the number of sea otters in western Alaska. Because sea otters eat sea urchins, the loss of sea otters in turn has increased the number of sea urchins there. And because sea urchins consume kelp beds, kelp beds there are disappearing, removing a significant source of food for other ocean life (Estes et al., 2011). [36]

Another example of the ocean chain reaction concerns whales themselves. The whaling industry that began about 1,000 years ago and then intensified during the eighteenth century severely reduced the number of whales and made right whales almost extinct. In southern oceans, whale feces are an important source of nutrients for very small animals and plankton. As the whale population in these oceans has declined over the centuries, these animals and plankton that are essential for the ocean’s ecosystem have suffered immeasurable losses (Weise, 2011). [37]

Bycatch. In addition to overfishing, bycatch, or the unintentional catching and killing of fish, marine mammals, sea turtles, and seabirds while other fish are being caught, also endangers hundreds of ocean species and further contributes to the chain reaction we have described. The US National Oceanic and Atmospheric Administration (2012) [38] says that bycatch “can have significant social, environmental, and economic impacts.” It costs the fishing industry much time and money, it threatens many ocean species, and it endangers the ocean’s ecosystem.

A familiar bycatch example to many Americans is the accidental catching and killing of dolphins when tuna are being caught by large fishing nets. A less familiar example involves sea turtles. These animals’ numbers have declined so steeply in recent decades that six of the seven species of sea turtles are in danger of extinction. The major reason for this danger is bycatch from shrimp trawl nets and other types of fishing. This bycatch has killed millions of sea turtles since 1990 (Viegas, 2010). [39]

Climate change. Other ocean problems stem from climate change. The oceans’ coral reefs are among the most colorful and beautiful sights in the world. More important, they are an essential source of nutrients for the oceans’ ecosystem and a major source of protein for 500 million people. They help protect shorelines from natural disasters such as tsunamis, and they attract tens of billions of dollars in tourism.



http://images.flatworldknowledge.com/barkansoc/barkansoc-fig15_x016.jpg

The decline of the whale population due to the whaling industry threatens the world’s supply of plankton and other very small marine animals.

Image courtesy of Joel T. Barkan.
Despite all these benefits, coral reefs have long been endangered by overfishing, tourism, and coastal development, among other factors. Scientists have now found that climate change is also harming coral reefs (Rudolf, 2011). [40] The global warming arising from climate change is overheating coral reefs throughout the world. This overheating in turn causes the reefs to expel the algae they consume for food; the algae are also responsible for the reefs’ bright colors. The reefs then turn pale and die, and their deaths add to the ocean’s food chain problem already discussed. Scientists estimate that three-fourths of the earth’s reefs are at risk from global warming, and that one-fifth of all reefs have already been destroyed. They further estimate that almost all reefs will be at risk by 2050.

Global warming will continue to be a main culprit in this regard, but so will increasing acidity, yet another problem arising from climate change. As carbon dioxide is released into the atmosphere, much of it falls into the ocean. This lowers the oceans’ pH level and turns the oceans more acidic. This increasing acidity destroys coral reefs and also poses a risk to commercial species such as clams, lobsters, and mussels.

An additional ocean problem stemming from climate change is rising sea levels (Daley, 2011). [41] Global warming has caused polar ice caps to melt and the seas to rise. This problem means that storm surges during severe weather are becoming an ever-greater problem. Even without storm surges, much coastal land has already been lost to rising ocean levels. Despite these problems, many coastal communities have failed to build adequate barriers that would minimize damage from ocean flooding.


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