Read the following passage about the Greenland ice sheet.
The Greenland ice sheet is the second-largest body of ice in the world, after the Antarctic ice sheet.
It covers approximately 1.7 million square kilometers.
Recent data from NASA indicates that the ice sheet is melting at an accelerated rate, contributing to global sea-level rise.
This rapid melting is undoubtedly the most alarming environmental crisis of our time.
Which of the following statements from the passage is an opinion?