
In
1804 world population was 1 billion which increased to 2 billion in 1927 and
within thirty two years it reached to 3 billion in 1959 and in 1974 it was 4
billion where as in 1998 it was 6 billion. We can observe that the rate of
population increase is very high and last year 31st October 2011 it
reached to 7 billion. Today at present the population of the world is more than
double as compared to 1950. In 2050 it is expected to cross 9 billion. In poor
nation population increase is highest nearly four times that of 1961. According
to UNFPA we have to face new challenges every time as land is shrinking and
there is lack of space, raw material and minerals are limited, gap between rich
and poor is increasing day by day due to addition of 7.8 million people every
year which is ultimately affecting our living environment.
In
whole world China has the highest population of 1.3 billion followed by India
1.2 billion which is 17.5% of world population. There are many countries whose
land area does not mark up with the population. At the same time countries like
Brazil, Canada etc. has very less population as compared to their land area.
7
billion world population has given rise to many challenges and yet many more to
come. In whole world more than 1 billion people sleep without having food at
night. The rate of population increase does not match the rate of production of
food materials. In future when this population will increase 2-3 billion more,
then it would be very difficult to feed all the people. Today challenges
related to environment pollution are very important for human race. Since there
is an increase in population we are clearing forests to build township which is
ultimately affecting our environment, due to this there is a change in climate
resulting many species to extinct or are at the edge of existence and if this
goes on like this then one day human will also exist from this planet.
According
to scientist till 2050 the consumption of energy will be double or even more
than that. Today only 20% of total energy consumption comes from petroleum
products and which is limited in this earth. In coming future when this will
increase to 30% then it will be difficult to satisfy the demand of increasing
population because at present only we are 70% dependent on petroleum products.
It is like a time bomb for this whole world. It is a fact that one day all
these petroleum products will dry up then we will have to face various
difficulties in terms of energy, if any supplementary means of energy is not
found. It is a very critical situation for south Asia - Africa and Central
America, for example; in Ethiopia where people are suffering from scarcity of
food at the same time they are also suffering from scarcity of water. At which rate population is increasing in the
same rate we are also polluting water by various human activities. Two third
portion of earth is filled with water but it is of no use.
Globally
many countries have been inspired by the problem of better established life.
According to rough figure nearly 17.5 million people are living a established
and better life and this is only 3%of the total population of the world. Among
these many are from developed nations, but this number is also increasing
gradually in developing nations. The increase in population is also affecting
country’s growth. Day by day pressure is increasing on land and there has been
a decrease in 30% of animal species as human has been destroying the
environment by one or the other means. If humans goes on harming the
environment and rate of population does not decreases then in future earth will
become small and we will need one more planet to live.
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