It is a fact that people are expected to live longer on a worldwide scale, which raises alert for potential issues, but brings in benefits at the same time. Whilst I agree with the latter outcome, I opine that the negative side outweighs the opposite one.
The adverse ramifications of lifespan extension are seen in the detrimental health and the running-out resources. Firstly, as more people live to old age, they are likely to suffer from acutely chronic diseases such as Alzheimer, the blurry vision, . . . given that the immune system deteriorates by the time. Consequently, not only their lives have high chances to be miserable but also, they could become the burden of the health care system and their families. Secondly, the population ageing leads to the more land and welfare occupied by people who are unable to contribute to the society, or the economy. By the time, the residential facilities, resources and merchandise will no longer meet the increasing demands.
Looking on a brighter side, the two major advantageous of lengthened lifetime are advices for the youth and the expansion of workforce. Aged people might pass down to the posterity wisdom from ages of living that can shorten the path to succees of the younger generation. However, the day by day advance is turning some conventional wisdom into behind-the-time understandings. The partly conservative patriarchies in remote Asian areas exemplify that. From a capitalist perspective, less people passing away results in more human resources to be exploited. Despite being able to recruit more labors, the fact that a large number of them has already been over the working age and their states of health in this regard might cause the plans to backfire.
To conclude, after weighing both sides, I’m convinced that the disadvantages of living longer is outweighed by the advantages. 
It is a fact that  
people
 are  
expected
 to  
live
 longer on a worldwide scale, which raises alert for potential issues,  
but
 brings in benefits at the same time. Whilst I  
agree
 with the latter outcome, I opine that the  
negative
 side outweighs the opposite one.
The adverse ramifications of lifespan extension are  
seen
 in the detrimental health and the running-out resources.  
Firstly
, as more  
people
  live
 to  
old
 age, they are likely to suffer from  
acutely
 chronic diseases such as Alzheimer, the blurry vision 
, .
  .
  .
  given
 that the immune system deteriorates by the time.  
Consequently
, not  
only
 their  
lives
 have high chances to be miserable  
but
  also
, they could become the burden of the health care system and their families.  
Secondly
, the population  
ageing
 leads to the more land and welfare occupied by  
people
 who are unable to contribute to the society, or the economy. By the time, the residential facilities, resources and merchandise will no longer  
meet
 the increasing demands.
Looking on a brighter side, the two major advantageous of lengthened lifetime are advices for the youth and the expansion of workforce. Aged  
people
 might pass down to the posterity wisdom from ages of living that can shorten the path to  
succees
 of the younger generation.  
However
, the day by day advance is turning  
some
 conventional wisdom into behind-the-time understandings. The partly conservative patriarchies in remote Asian areas exemplify that. From a capitalist perspective,  
less
  people
 passing away results in more human resources to  
be exploited
. Despite being able to recruit more labors, the fact that  
a large number of
 them has already been over the working age and their states of health in this regard might cause the plans to backfire. 
To conclude
, after weighing both sides, I’m convinced that the disadvantages of living longer  
is outweighed
 by the advantages.