Opinion of certain individuals is that Mars would be the second option for human beings after the elimination of earth so researchers would continues their researches. However, I am completely agree with those who think that government should pay more attention to increase the life of earth.
Why scientists tries to research the life possibilities on Mars? The major reson is that increments in hazardeous pollutants. To eleborate it further, there are some dangerous acids, gases and some undisposable products which are not resistant to the human life. These products and pollutants will not diminsh ever once they create and spread some diseases. So, to save humanlife from these diseases, scietisits will tries to researches the life expectancy on Mars.
Moving further towards, I am completely agree with those who supports to state for increasing life of eath. There are some reasons behind it. Earth is life resistant is the prominent reason, to explain it, earth is that planets of galaxy which already had the all elements of human life like oxygen, water, fresh air and fertility of growing plants. Without these factors, life is impossible on earth so government implement some strategies to preserve these resources. Furthermore, less expensive process is the secondary reson, to describe it, finding the life on other planets is quite expensive process, lots of technical devices and rockets are required. While, preservation process of earth is not much expensive. Just good campaign of the green world and afforestation is required which would be not much costly.
To conclude it, due to hazardeous pollutant elements, life becoming difficult on earth, so scientist research life possibilities on Mars. However, I support to those who believe that earth is rich in humanlife resources and presevation is inexpensive so state stays more focused on it.