 gespannt rights psychological problems the human population is growth first are contents population growth the earth's carrying capacity and the age structure of populationshere we talk to the first guys what are the major ecological problem environmental issues or ecological issues so we talk about that there are a few the major ecological problem one of them is human population human population itself the major ecological problems the other problems they are the pollutions and the third one it may be the biodiversity loss so these are the main ecological problems which need to be handled so the first one the human population growth or the population growth population growth is basically is the increase in number of individual within a population so with which speed the population going to increase this is that will be the population growth so expanding human population is a major problem to environment itself for the earth itself so how the increasing human population is the major problem for the environment because when they are the more human when there are more people then ultimately they need more resources human then what will do is that the natural resources will exploit them over exploit them which ultimately the natural phenomena will be disturbed your natural ecosystems and they will be disturbed for more human more human mean more food more food food more urbanization more industrialization and all these things they are actually destroying the natural environment other natural ecosystems so if we can see what is the carrying capacity of our planet that our planet is earth has carrying capacity so number of individuals if we are giving the facilities to our human full facilities to all human present on earth so then we can say the five billion people are even more than sufficient for us to support them current population of world is more than 7.7 billions then we can say that in 2019-20 the population is more than 7.7 so ultimately this population will increase the maximum population which this earth can support it is estimated it is the 9 to 10 billions 9 to 10 billions human their needs somehow earth jobs can be fulfilled in that the reason is that if we are full fledged again I am repeating that if we give full facilities to every individual in which developed countries are given then the present population will not be able to support the earth whereas if we see overall how many people can be accommodated how many people can survive on this earth they are 9 to 10 billion so if the population increases at this speed then ultimately the human population will be so much that the earth will not be able to support it ultimately the resources will be shorted so how we can predict the population growth the one thing is the age structure if we see any age structure of the population then we have an idea that in future the population will increase or decrease or how the population will grow in the population structures the number of individuals which are in pre-reproductive stage second class is those individuals which are present at reproductive stage third is the are the individuals which are in the post-reproductive stage that means those are infants pre-reproductive means those are infants reproductive stage means the adults who are producing their young ones and post-reproductive means who are getting old whoever has not reproduced or their age has increased if in any society there are more aged persons then this means that in the near future the population will decrease if there are more infants in the population then it means the population is yet blooming the population is getting bigger so the growth rate is more and the growth rate will increase in the future so if we compare with nature there are many different organisms in nature the reproductive potential of these organisms is very high for example, let's take fishes fishes have very huge reproductive potential but the thing is that the infants die at high mortality rate the offspring of the infant die at the maximum of their death few survive in humans the maximum of infants they survive so the result is that in the natural population if the reproductive potential is high or the reproductive rate is high then it is getting balanced because it is balancing the environment in the case of humans more reproduction means more surviving individuals and more surviving individuals means the population will increase at the logarithmic scale it will increase rapidly here we have the chart of the human population if we compare the human population in 1800 there was only 1 billion persons living on this earth in 1930 the persons were 2 billion now from 1930 till 1999 from 1932 to 1999 it is approximately 70 years in 70 years the population has increased from 2 billion to the 6 billion estimate that by the end of 2050 the human population will reach to the near to the 10 billion its estimate is that after 2050 or 2100 the human population will start declining because there is no capacity to support the earth so ultimately the human population will start decreasing