Fill in the blanks with appropriate words.

To say that saving the earth is the need of the hour would be an ____(1)____. All the activities of humans driven by greed and selfishness have caused ____(2)____ damage to the earth. It is degraded beyond repair. Almost all the natural resources are now polluted due to these ____(3)____. When all these resources will be under threat, naturally lives of all living organisms will be under _____(4)____. This is why we need to save the earth at all costs. All the other issues are _____(5)_____ and saving the earth is the main concern.