Many clearly assert the earth won’t be suitable for the humanity due to all sort of enviromental issues, sothat the need for a new planet will be urgent to survive. In my opinion, this solution could be considered merely as a fantasy, cause of the enorme difficulties and irrational thoughts based on.
First, only the searching for a suitable planet took a very long duration and involve a major waste of resources, however travelling from earth across the universe to reach the promised planet will potentially cost so much than we could think, either on the researches and studies or on practecing and experincing . Moreover, there is a need to a such long periode of time to devlop the essential technologie capable to achieve this goal. For example, the costs to explore only Mars took about 20 years as well as a huge budget estimated to overtake billion of dollars, so it is rough to imagine how realising a such journey could be costly.
Morefurther, theoretically, it is impossible to undertake such a journey. The current researches and studies confirm the existence of potential suitable planets, althought the nearest one could be reached along a distance of several light-years. More, technically in physics the hightest speed on the universe is the light speed and no positive mass has the ability to reach it, whereby particularly a such travel could last for thousands years, which is irrational and illogic.A clear example of this is the duration of 50 years taken by a satellite to cross merely our galaxy, so what about realizing a travel of many light-years.
Finaly, a such solution is unlikely to be considered in the next future, meanwhile spending and wasting resources and time on unguaranteed solutious could be not understood for the next generations, instead of preserving the already existent suitable planet.