Nt = Future Population
N0 = Starting population
r = growth rate
t= number of years.
Note: e is a constant equal to 2.71828
MANY missing variables.. like disease, pestilence.. war..
it's not a linear formula its an exponential formula
Any time the RATE of increase is greater than one. For example : if a population were to double (note that 2 is greater than 1) each generation then it is referred to as exponential growth. Note also that there are now 7 billion people on Earth - exponential growth. What is "needed" for this kind of growth is an unlimited environment, since it does not exist in the real universe, exponential growth ALWAYS crashes.
Human population growth was gradual for most of the time people have existed, only in the last two centuries has population growth been rapid.
When the food source is depleted, a new predator is introduced, or balance is attained. The earth tends to find balance for the most part. As far as an "intelligent" species such as humans goes, probably never. or When the organisms compete
They were not invented because they predated the first human beings. They existed at least millions of years before there was anyone to "invent" them.All novae produce radioactive elements and these decay exponentially. So exponential decay predates the formation of the solar system.I am not sure, but stellar fusion may be exponential. But, in any case, there are life forms on earth, like bacteria, that exhibit exponential growth. These bacteria, and therefore exponential growth, predate human beings by a few million years.They were not invented because they predated the first human beings. They existed at least millions of years before there was anyone to "invent" them.All novae produce radioactive elements and these decay exponentially. So exponential decay predates the formation of the solar system.I am not sure, but stellar fusion may be exponential. But, in any case, there are life forms on earth, like bacteria, that exhibit exponential growth. These bacteria, and therefore exponential growth, predate human beings by a few million years.They were not invented because they predated the first human beings. They existed at least millions of years before there was anyone to "invent" them.All novae produce radioactive elements and these decay exponentially. So exponential decay predates the formation of the solar system.I am not sure, but stellar fusion may be exponential. But, in any case, there are life forms on earth, like bacteria, that exhibit exponential growth. These bacteria, and therefore exponential growth, predate human beings by a few million years.They were not invented because they predated the first human beings. They existed at least millions of years before there was anyone to "invent" them.All novae produce radioactive elements and these decay exponentially. So exponential decay predates the formation of the solar system.I am not sure, but stellar fusion may be exponential. But, in any case, there are life forms on earth, like bacteria, that exhibit exponential growth. These bacteria, and therefore exponential growth, predate human beings by a few million years.
High growth
When the food source is depleted, a new predator is introduced, or balance is attained. The earth tends to find balance for the most part. As far as an "intelligent" species such as humans goes, probably never. or When the organisms compete
Because it doesn't take long for the organisms doing the growing to fill the entire Earth.
the earth's carrying capacity
Population growth and species survival.
In the last 200 years, there has been a tremendous growth rate of the Earth's population. 200 years ago the population was about one billion. Today in 2014, the population is about 8 billion.
The higher the death rate is, the fewer people there are on the Earth.