Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 26 to 30.

Greenland has always been a harsh place to live. Although it is the biggest island in the world, the enormous ice sheet covers 75% of its surface. (26) ________, that could be changing. As a result of global warming, Greenland's ice is melting. Huge chunks of ice, some measuring as much as 120 km2, have been breaking off Greenland's glaciers and drifting off to the ocean. Warmer weather is also bringing more rain, (27) ________ is slowly melting the ice of the interior.
The real question is, what is underneath the ice? (28) ________ mining experts say Greenland could hold massive deposits of gold, precious stones, rare earth, metals and even oil. The government is encouraging companies to come and set up mines, but many Greenlanders worry that the mining industry will not (29) ________ their lives. They fear its (30) ________ on the environment in one of the last unpolluted places on Earth.
(Adapted from On Screen)