Windsor, Canada is growing at rates that hasn’t been seen in at least two decades. What is causing the growth at such drastic rates? Experts are saying that the lure of a strong economy, affordability, access to the U.S., immigration and secondary immigration from within Canada are the cause.
From July, 2006 to July, 2009, the population decreased or remained the same for 36 consecutive months. It began to rebound in 2011, and the growth rate of the past 16 months is two to three times what the previous seven years produced.
This growth is extremely important because it isn’t just retirees. It is also young families with lots of children. It looks to grow even more as the agricultural area expands as well as the residential areas.
This growth is a great example of the hunter and the prey analogy that we spoke about in class. As the population grows, so does the work, but once the work is complete, then what happens to the population growth?
Windsor saw this happen in the 80’s when the GM and Ford companies began a tremendous amount of expansion. I hope that Windsor learned from history so that it doesn’t see an even larger recession in the near future.
Population growth does not follow exponential growth mainly because of limited resources. However, in laboratory environments populations can exhibit exponential growth. For example, bacteria populations grow incredibly fast because of their short reproductive times. In the article Exponential & Logistic Growth “we could start with just one bacterium and have enough bacteria to cover the Earth with a 1-foot layer in just 36 hours.”
In exponential growth models, the rate of growth in a population never changes and is typically unrealistic. In the real world resources like food, for example, will run out if a population keeps growing exponentially. Thus a population will reach its carrying capacity. Carrying Capacity is the maximum number of individuals a population can support based on that population’s needs.
As we discussed in class, the Rule of 70 is used to figure out how quickly something will double when it is growing exponentially. When you divide 70 by the percent increase the outcome is the doubling time. When you divide 70 by the doubling time the outcome is the growth. The Rule of 70 is often used to predict population growth but it has other uses as well. One of these other useful applications of the rule is estimating how long it would take a country’s real gross domestic product to double. Here you use the GDP growth rate in the divisor of the rule which is similar to calculating compound interest rates.
For example, if the growth rate of Japan is 10%, the Rule of 70 predicts that it would take seven years for Japan’s real GDP to double.
That being said, it is important to remember that the Rule of 70 is only an estimate based on forecasted growth rates. Therefore, if the rate of growth fluctuate then the original calculation may be inaccurate. Because of this, the Rule of 70 should not be used where growth rates are anticipated to vary dramatically.
All of the coral reefs combined is less than 1% of the oceans environment but yet it is home to more than any environment that the ocean has to offer. Coral reefs has 25% of all marine life living in them about 2 million species. Compared to the rainforest that only have 10% of terrestrial animals. But within the last 30 years 50% of coral reefs have disappeared.
People depend on the coral reefs for a multitude of things. 1/5 of protein consumed is from seafood. The coral reef fishery is a billion dollar industry. About one billion people eat fish as their main source of protein. 1/8 of the world’s population live near coral reefs.
Even in medicine. Scientist are 400% more likely to find new drugs in coral reefs. Treatments for cancer and HIV is found in coral reefs. Coral reefs is a big industry for tourism as it brings in 3 billion dollars in Florida alone. Coral reefs brings in 30 billion dollars each year.
The human population growth has increased dramatically. However, the majority of the expansion has happened more recently then people might expect. Over many years researchers have gathered information about man kind that we then used to develop predictions about where the growth of the population is headed.
When the number of beings in a specific population increases, this is known a population growth. To most people, or at least for me, the term population growth doesn’t mean much. The world seem to be handling the number of people just fine. But, when you look at just how much the population has really grown, you start to wonder if the world is actually doing well.
Prior to 1804, the human civilization had a fairly sable population. Around that year the population started to climb and it reached the one billion mark. from that point forward the rate of growth has increased incredibly fast.
Reaching the two billion mark took about 124 year. This is a long time compared to the next 5 billion people that populated over only a span of 84 years, roughly twelve to fifteen years per billion.
Now the human population is around 7,714,576,923. That is a staggering number. This number is especially scary knowing that it has been increasing about 80 million a year or almost 1,500,000 each week. However, the rate at which the population grows is about 50% less now then it previously was. Though the rate of growth has slowed, the population is still growing and is projected to continue to increase.
When researchers attempted to calculated the populations trajectory, they took into account what would happen if each family size varied by just half a child. (which doesn’t make sense to me. why calculate half a person, what even is half a person.) The results of this is actually rather major.
Estimated Human Population Through History 10000 BCE: ~2.4 million
5000 BCE: ~17.9 million
2000 BCE: ~72.1 million
1 CE: ~188.25 million
1000 CE: ~295 million
1700 CE: ~603 million
1800 CE: ~989.8 million
1900 CE: ~1.65 billion
1950 CE: ~2.53 billion
2000 CE: ~6.2 billion
2015 CE: ~7.35 billion
March 2019 CE: ~7.7 billion
The population of humans on our planet went through an exponential growth spurt, beginning roughly at the start of the twentieth century. In the year 1900, the estimated global population was roughly 1.65 billion people. Only one hundred years later, and the population more than tripled to 6.2 billion – more people were alive at the start of the millennium than had ever existed previously. To put this into perspective, more people were born in the last one hundred years than had been born since the beginning of the earliest civilizations, five-thousand years ago.
This exponential growth was short lived, however. The global population growth rate peaked at ~2.1% per year in the mid 1970’s, and has subsequently begun to decline. This will likely continue until the growth rate reaches close to zero, which is estimated to happen shortly after the beginning of the next century. Every species has a carrying capacity. Will we reach ours by the year 2100 CE? That’s what many experts seem to believe.
The exponential growth of purple loosestrife, an invasive flower introduced to North America around the 1800’s, is incredible.
Multiplying quickly, purple loosestrife can max the carrying capacity of marshy and pond-like areas in the span of a year. According to Garden Know How, one plant produces approximately half a million seed a year. Purple loosestrife’s exponential rate of growth is amazing since its seeds have an extremely high germination rate, and it has no real limiting resources.
On a graph, purple loosestrife’s original growth rate would look something like this:
However, over time, the purple loosestrife’s rate of growth peters out, looking more like this:
Though purple loosestrife has no predators, the environment it takes over only has a certain amount of resources. This acts as the limiting factor.
Unfortunately, since its only limiting factors are its environment, chemicals, and people, it continues to run rampant, destroying habitats for many kinds of wildlife.
The golden ratio is a ratio of 1 to 1.618, and seems to be demonstrated a lot in nature (flower pedals, seed heads, pine cones, shells, hurricanes, etc.) This ratio is mathematically represented by the Fibonacci series (1, 1, 2, 3, 5, 8, 13) – each number being the sum of the two previous numbers. It also has been shown to be found in art and architecture. It seems that this ratio pleases the human eye, but the reason as to why it is so aesthetically pleasing to look at remains unknown.
It is important to understand the difference between simple and compound interest. Two different equations, resulting in two different outcomes. Compounding interest is the common used methods and is mostly used with deposit accounts and/or loans.
Simple interest is interest that reoccurs on your initial investment. For an example if you invested $5,000 at a rate of 3%, the first yea you will get back $150. Year two is $150, Year three is $150 and so on and so on.
Compounding Interest works different. Let’s take that initial investment of $5,000 at a rate of 3%. The first year is similar with simple interest which resulted in $150. However after the first year is when everything changes. The second year 3% is not on $5,000, but $5,150 which equals out to $5,154.
This is what we talked about in class when discussing exponential function. Although my example wasn’t as extreme as the grain of rice or bacteria in a bottle but with the compounding interest formula and my given data after 10 years it would calculate to $6,719.58 verse $6,500. $219.58 extra if you used compounding interest.
I have never actually seen the movie Network, but what I have seen and have been very inspired by is the scene where the American public stood up, went to their windows, and screamed “im mad as hell, and im not gonna take it anymore!” This is how many may feel about the astronomical amount of debt our country has been accumulating.
Like some of the issues our country has been facing, our national debt has been growing and there doesn’t seem to be any slowing down. But is there actually an argument to be made that it is growing exponentially?
“We find it just a little confusing why the CBO never warned of an imminent “fiscal crisis” over the past 8 years when total US debt doubled, increasing by $10 trillion under the previous administration.” Writers at Zerohedge speculate after examining a 2017 report made by the Congressional Budget Office.
This could have been forecast if you noticed the growth in the national debt as an average like above. Although it does not look perfectly exponentially, it is growing at a steady rate. Some others argue that our national debt is not exponentially growing. Tim Altom, a worker at IBM cloud and a writer on Quora, argues this.
“Methinks you misuse the term “exponentially”. We typically use this term for rates that are proportional to the function’s current value over time… the later years of the 21st century show a leveling off of the ratio, not exactly a runaway condition. The total debt rose sharply thanks to two nasty recessions and two “wars” that were put entirely on the national credit card and continue to sop up outsized money. Those recessions too dropped the GDP, which made the ratio appear larger.”
War and recessions make the argument that the debt would increase and decrease over those times. But it certainly paints the picture that our debt is certainly not exponential.
If you look at average projections, it also does not look perfectly exponential, but it is steadily growing.
Whether or not the growth is exponential depends on what graph you look at and what it contains. But one thing is for sure, although our national debt does not look to be perfectly exponentially growing, it is growing.
“The CBO forecasts that both government debt and deficits are expected to soar in the coming 30 years, with debt/GDP expected to hit 150% by 2047 if the current government spending picture remains unchanged.” – Zerohedge