Nowadays, space projects to find extraterrestrial life have been receiving a great deal of public attention. Although some people support these programs, the disadvantages will be far more significant
There are various reasons why some people support projects of finding new planets to live. First, since the birth rate is constantly increasing, the world is facing threat from problems of the population explosion. For example, baby boom might cause the lack of land and accommodation, which forces humans to resort to alternatives of changing living places to other planets. Second, global warming has had catastrophic effects on the green shelter, such as melting ice in both polar or rising sea levels. This means that living on the Earth is increasingly difficult, which leads to a growing number of people desire to have a new place outside the universe to live better.
Nevertheless, there are a number of compelling reasons why we should not spend money on these projects. First, since the cost of space studies is prohibitively expensive, many countries will fail to pay them in the long run. In fact, it will cost millions of dollars for crew, researchers, and scientists involved in this field, leading to budget deficits as an unexpected result. Second, by making space travel to discover the same terrain as the Earth, many scientists have responded that the chance of success is very slim. Plenty of evidence suggests that it takes hundreds of millions of years to bring people to the nearest planets, like Mars, but there is guarantee that there is life, not to mention the life expectancy of people is limited, which implies that such schemes will offer little returns.
In conclusion, although these programs are not without advantages, the downsides will justify these. By focusing on addressing existing environmental problems, humans might be able to make the Earth friendlier to live. 
Nowadays, space projects to find extraterrestrial life have been receiving a great deal of public attention. Although  
some
  people
 support these programs, the disadvantages will be far more significant
There are various reasons why  
some
  people
 support projects of finding new planets to  
live
.  
First
, since the birth rate is  
constantly
 increasing, the world is facing threat from problems of the population explosion.  
For example
, baby boom might cause the lack of land and accommodation, which forces humans to resort to alternatives of changing living places to other planets. Second, global warming has had catastrophic effects on the green shelter, such as melting ice in both polar or rising sea levels. This means that living on the Earth is  
increasingly
 difficult, which leads to a growing number of  
people
 desire to have a new place outside the universe to  
live
 better. 
Nevertheless
, there are a number of compelling reasons why we should not spend money on these projects.  
First
, since the cost of space studies is  
prohibitively
 expensive,  
many
 countries will fail to pay them in the long run. In fact, it will cost millions of dollars for crew, researchers, and scientists involved in this field, leading to budget deficits as an unexpected result. Second, by making space travel to discover the same terrain as the Earth,  
many
 scientists have responded that the chance of success is  
very
 slim.  
Plenty
 of evidence suggests that it takes hundreds of millions of years to bring  
people
 to the nearest planets, like Mars,  
but
 there is guarantee that there is life, not to mention the life expectancy of  
people
  is limited
, which implies that such schemes will offer  
little
 returns. 
In conclusion
, although these programs are not without advantages, the downsides will justify these. By focusing on addressing existing environmental problems, humans might be able to  
make
 the Earth friendlier to  
live
.