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How have the rate and number of people added to the human population each year changed in recent decades?

Short Answer

Expert verified

The rate and number of individuals within a population has dropped in recent decades, but there is a yearly increase in population.

Step by step solution

01

Earth’s population

The field of earth science defines earth as a spherical planetary body in the solar system that has a magnetic field to protect against harmful solar radiation.

The demographics field describes earthโ€™s population as a group representing the number of individuals, such as human beings living across the globe.

The effects of overpopulation on the earth are overcrowded cities, global warming, water pollution, deforestation, over-farming, waste production, over-consumption of natural resources (food, air, land, and minerals), resource depletion, and environmental deterioration.

Some solutions related to overpopulation are birth regulation, promoting family planning, sex education, government incentives, and extraterrestrial settlement.

02

Population

The distinct occupants of the same species capable of interbreeding with each other living in a single place at one time are called population.

The different reasons that cause population decrease or population decline are economic issues, infectious disease outbursts, natural disasters, war, and epidemics killing people.

03

Change in human population

Since the 1960s, the population rate was 2.2% in 1962, but this rate of earthโ€™s human population has decreased to 1.1% human population at present.

The number of additional individuals in earthโ€™s population is huge due to continuous increase in population size and is approximately seventy-eight million.

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Most popular questions from this chapter

Some people regard the rapid population growth of less industrialized countries as our most serious environmental problem. Others think that the population growth in industrialized countries, though smaller, is actually a greater environmental threat. What problems result from population growth in (a) less industrialized countries and (b) industrialized nations? Which do you think is a greater threat, and why?

Mice that experience stress such as a food shortage will sometimes abandon their young. Explain how this behavior might have evolved in the context of reproductive trade-offs and life history.

In 2014, the United States had a population of 320 million people. If the (annual) per capita change in population size (rโˆ†t) was 0.005, how many people were added to the population that year (ignoring immigration and emigration)? What would you need to know to determine whether the United States is currently experiencing exponential growth?

You are testing the hypothesis that increased population density of a particular plant species increases the rate at which a pathogenic fungus infects the plant. Because the fungus causes visible scars on the leaves, you can easily determine whether a plant is infected. Design an experiment to test your hypothesis. Describe your experimental and control groups, how you would collect data, and what results you would see if your hypothesis is correct.

(a) Find the intervals of increase or decrease.

(b) Find the local maximum and minimum values.

(c) Find the intervals of concavity and the inflection points.

(d) Use the information from parts (a)โ€“(c) to sketch the graph.

You may want to check your work with a graphing calculator or computer.

58. \(S\left( x \right) = x - \sin x,{\rm{ 0}} \le x \le 4\pi \)

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