▶ Your Answer : The reading passage states the main idea of the reading: the benefits of biopolymers. However, the listening passage refutes this idea by providing several counterexamples. To begin with, the author asserts that biopolymers have a strong biodegradability. He supports his idea by mentioning that biopolymers disintegrate easily overtime, turning into carbon dioxide, methane, and other compounds. In contrast, the speaker refutes his assertion by stating that biopolymers do not disintegrate easily. The professor says that biopolymers can only disintegrate when two conditions; humidity and temperature, is satisfied. Furthermore, the author contends that biopolymers are sustainable. He maintains his idea by pointing out that biopolymers do not jeopardize future generation’s natural resources. On the contrary, the listening passage contradicts this contention by stating that biopolymers contribute bad influences on the environment. It is said that many crops are demanded and to produce a lot of energy, the pollution will be the result of it. Last, the passage argues that biopolymers are produced on a large scale and sturdy. In the construction industry, they have been found in many products such as clothes or food. Conversely, the lecture challenges this argument by mentioning that biopolymers’ sturdiness is unproven. Actually, they are very vulnerable to heat and moisture. This leads to their limited access |