In this new century just scientists have presented researches that explain the difficult situation for the human race if this resource runs out.
After this, you can give examples on
what kind of difficult situation we are facing. That is,
what exactly would likely to happen if there is not enough water.Moreover, some investigations forecast the end of the world in 2070 which is not an exaggeration considering that some species of animals already have extinguished.
This sentence is abrupt and does not follow from the previous sentence.
It talks about animal, which is another natural resources that is disappearing.
Also, remember to indent when writing an essay!