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Lemur [1.5K]
3 years ago
11

Which public health hazards most directly result from the activities shown? Select the two correct answers. A. deforestation of

arable land B. pollution of fresh water sources C. destruction of ecosystems D. flooding of populated areas E. dangerous levels of smog Pls answer soon.
Social Studies
1 answer:
solniwko [45]3 years ago
8 0

Answer: Pollution of fresh water sources and flooding populated areas

Explanation:

Water is a source of living for aquatic animals and a source of feeding for humans. Polluted water is an hazard to aquatic animals, an example is crude oil, when oil is poured at some section of water, it tends to seize oxygen beneath the leading to loss of live for animals who stay there. When this animals are affected it causes a reduction in food for man, and in most cases, the water gets soiled beyond usage for man.

Flood is a major challenge in some areas in the world, flood leads to death and discomfort of humans, when property house planning are not done it results to flooding. This destroys both homes, humans and livestock.

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Diseases in the present age are very different from diseases of the past discuss ​
PolarNik [594]

Answer:

Control and prevention measures had decreased the incidence of many infectious diseases, and with the ability to continue to identify new antibiotics, to handle new problems, and the ongoing development of appropriate vaccines, his statement appeared to be appropriate.

In the US, similar feelings were expressed and funding for infectious disease fellowships began to decline with federal resources being directed elsewhere.

The history of the world is intertwined with the impact that infectious diseases have had on populations. Evidence of smallpox has been found in 3000-year-old Egyptian mummies. Egyptian papyrus paintings depict infectious diseases such as poliomyelitis. Hippocrates wrote about the spread of disease by means of airs, water, and places, and made an association between climate, diet, and living conditions. Investigators described miasmas as the source of infections. Fracastoro discussed the germ theory in the 1500s and three routes of contagion were proposed—direct contact, fomites, and contagion from a distance (airborne). Epidemics of leprosy, plague, syphilis, smallpox, cholera, yellow fever, typhoid fever, and other infectious diseases were the norm.

The development of the microscope by Leeuwenhoek in the 1600s allowed scientists to visualize micro-organisms for the first time. The 1800s brought knowledge of the cultivation and identification of micro-organisms. Vaccines were developed and used which introduced specific methods to our storehouse of measures for control and prevention. Pasteurization was another important contribution to disease control. An appreciation of the environment and its relationship to infectious diseases resulted in implementation of broad control measures such as community sanitation, personal hygiene, and public health education. The importance of nutrition was appreciated for its impact on infectious diseases.

The 20th century brought chemotherapy and antibiotics into our infectious disease armamentarium. Greater dependency upon vaccination programmes and health education became important allies in our efforts at reducing the occurrence of infectious disease. So Sir McFarland’s statement was not an off hand remark.

But we are now aware that emerging and re-emerging infections have become a significant worldwide problem. In 1991, the Institute of Medicine of the National Research Council in the US appointed a 19-member multidisciplinary expert committee to study the emergence of microbial threats to health. Their report published in 1992 was entitled, ‘Emerging Infections —Microbial Threats to Health in the United States’ but the concepts that they discussed certainly have worldwide application.1 They concluded that six categories of factors could explain the emergence or re-emergence of infectious diseases. These factors are: Human demographics and behaviour; Technology and industry; Economic development and land use; International travel and commerce; Microbial adaptation and change; and Breakdown of public health measures.

Explanation:

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The Spanish freed enslaved Native Americans and proceeded to sign treaties with the Native Americans such as the Chickasaw, the Choctaw, and the Tallapoosa and Alabama as they hoped to gain their support in case the Americans ever tried to take Louisiana.

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