MHE513 - Risk Assessment and Epidemiology Module 2 - Case Essay

MHE513 - Risk Assessment and Epidemiology Module 2 - Case - Essay Example The Public Health Statement of Agency for Toxic Substances and Disease Registry (ATSDR, 2005) provides information about zinc, including the hazards associated with excessive exposure to the otherwise essential element. Zinc is a ubiquitous element of the earth’s crust, occurring in small amounts in almost all igneous rocks. It is widely distributed in air, water, soil, and all living matter. Zinc enters the environment both through natural processes and human activities, in particular activities such as mining, purification of zinc, lead and cadmium-containing ores, steel production, and coal and waste burning. Increased levels of zinc in the soil can occur through disposal of wastes from metal manufacturing industries and electrical utilities producing coal ash, and fertilizer application. Industrial and domestic sewage and run-off from soil containing zinc can release zinc into waterways and ground water. Zinc, present as fine dust particles in the air, is washed down by rain and snow into the lakes and rivers where it mostly settles on the bottom. A small amount of zinc may occur dissolved in water. The concentration of dissolved zinc increases with increasing acidity of water. Zinc and its compounds have many industrial uses including galvanization of iron and steel to prevent rusting and corrosion; preparation of alloys such as brass and copper; manufacturing of dry cell batteries, white paints, ceramics, rubber, fabric dyes and wood preserving compounds. Zinc is also an important constituent of cosmetics, hair-care and health-care products such as sunblock lotions, talcum powder, anti-dandruff shampoos, diaper rash ointments, deodorants etc. Zinc chloride is used to make smoke bombs. Zinc carbamates are used as pesticides (World Health Organization WHO, 1996). Exposure of humans to metals is generally inevitable as metals are ubiquitous in the environment. Chemicals including zinc are released into the environment (air, water

Freedom movement Essay Example | Topics and Well Written Essays - 1000 words

Freedom movement - Essay Example It also marked an important moment for the Black American society who continuously fought for equal rights within the American society (Smith & Wynn, 2009. The act ended the application of the Jim Crow laws that upheld segregation under the principles of â€Å"separate but equal.† It is important to note that prior to the passage of the Civil Rights Act of 1964, African-Americans faced serious discrimination in nearly all important sectors of the economy including employment, transport, property ownership, education and even politics. The passage of the law has since shaped the American society and that is still undergoing transformation. The consequences of the passage of the Civil Rights Act 1964 have seen significant diversity in the employment sector in America. Currently, Blacks face limited if any discrimination in employment. This has seen significant growth of the American economy as every individual struggles to involve in any income generating activity. Since the pas sage of the Act that led to increase in employment of the African-Americans, the economy of the USA has witnessed significant stability considering fair distribution of income and reduced overreliance of the economy on the White population. Additional consequence of passage of the Civil Rights Act of 1964 relates to significant integration of people from different races, religion and ethnicity, which is working to liquidate some of the native culture of the various American communities. In politics, the passage of the act has seen significant involvement of Blacks in the daily politics of USA. It is due to the strict provisions of the Act that America is currently under the Presidency of Barrack Obama who is a Black American. Furthermore, it is due to the Act that African-Americans like Condoleezza Rice managed to occupy powerful government office during administration of President George Bush. Montgomery Bus Boycott (1955-1956) The cause of the boycott related to the arrest of Rose Parka who was a civil rights activist for failing to empty a bus seat in Montgomery. The Black community responded to the arrest by boycotting transport by bus until in 1956 when court overruled the segregation laws in Montgomery as unconstitutional. This even revolutionized social structure and has led to free interaction between Whites and the Blacks (Phibbs, 2009). The law has seen free movement of people across the states by same transport means. This has worked to alienate fears of discrimination alongside enhancing trade and economic development in the USA. The event and the accompanying ruling transformed the political policies created by states and local governments. Currently, many states abide by the principles of equality and fairness that has help in political stability in America. Role of Black women in the Freedom Movement Despite being subject to gender discrimination within their own race, Black women proved an essential part of the whole Freedom Movement. Black wom en assumed the roles of bridge leaders to support their male counterparts in advancing their fight for freedom. The women assumed the roles of bridge leaders because it was only area that they could occupy since men held the formal leadership positions. In that line, the Black women practiced four main types of bridge leadership that included mainstream, community, indigenous and