Dear all, I have been doing IELTS Reading on this passage (please see IELTS Academic reading sample), and for Question 31 the answer is in Paragraph A. ' In recent years we have all been exposed to dire media reports concerning the impending demise of global coal and oil reserves, but the depletion of another key non-renewable resource continues without receiving much press at all. Helium – an inert, odourless, monatomic element known to lay people as the substance that makes balloons float and voices squeak when inhaled – could be gone from this planet within a generation.' I don't understand very much, because I see helium's chemical properties, and I also see nonscientist's (lay people) view, but I think the two are the same, I don't see the contrast, could you please tell me where is the contrast in Paragraph A? Thank you very much in advance.