COLUMBUS STATE COMMUNITY COLLEGE ESSH 1101-Introduction to Environmental Science

Question

COLUMBUS STATE COMMUNITY COLLEGE ESSH 1101-Introduction to Environmental Science, Safety &Health ame Nohammed A Homework 1 - Introduction to Environmental Science, Safety&Health Environmentol Science:Earth as a Living Planet,9 Ed.-Chapter 1. About how many people are currently on the Earth? Approximately how many humans do we expect to live on the Earth in 2050? 2. What pressures does the large human population put on natural resources and on 3. Describe how the book Silent Spring had an impact on educating the public about environmental concerns. (You need to research this beyond the textbook.) In your own words, define the phrase environmentol sustainability. What are the two formal scientific meanings of sustainability with respect to the environment? 4. 5. Identify two current human practices that are considered environmentally unsustainable.

Explanation / Answer

1) About 7.6 billion people are currently living on the earth.

Median estimation reveals that the world population will reach 9.8 billion by 2050.

2) With increasing population use of different energy resources are also increasing. Fossil fuels,one of the vital sources of energy for humans, are nonrenewable. So, with increasing use of these sources, these are gradually getting finished. Moreover, excessive use of the fossil fuels generate a large volume of greenhouse gases and other harmful gases. These gases are increasing average temperature and degrading the condition of the air and thus causing vital damage to the human health.

3) The book is a textbook for demonstrating the effects of uncontrollable use of chemicals on the environment. In 1950's Rachel Carson turned her attention towards the adverse effects of excess use of pesticides. Silent spring is the result of this concern. In the book she described the pesticides as "Biocides" as their effects are not restricted to a certain pest or organism. The entire book is focused towards the harmful effects of pesticide on the ecosystems.

4) Environmental sustainability refers to the perfect state of harmony, where there is an equilibrium prevailing between the demands placed on the environment and the efforts to its restoration. At present we are eroding the environmental conditions at a very high pace.

5) Use of fossil fuels and use of chemical fertilizers to change the nature of the soil, are two unsustainable practices.

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