※ 질문하기질문내용42. When all relevant factors are accounted for, biofuels
produce more greenhouse gas emissions than fossil fuels. A
recent study concluded that biofuels are not a proper answer.
Biofuels seemed so promising at first ─ what could be
cleaner than running our cars and factories on plants? But
early predictions were difficult to believe. Biofuels don’t do
much good at all. The study, led by Princeton University
environmental law researcher, Timothy Searchinger, found
that replacing fossil fuels with corn-based ethanol would
double greenhouse gas emissions for the next thirty years.
Even *twitch grass, a good candidate for biofuel, seen as a
far more efficient alternative, would produce a 50% increase
in emissions.
이게 문제였구요,
문제가 다음글에서 생물연료에 효과에대한 필자의 어조로 가장 알맞은것은? 입니다.
보기 1. positive 2. horrified3. skeptical 4. impressed 5. persuasive
인데요,
저는 5번을 찍었는데 애들은 3번이라고하더군요,
의심가는이랑 설득적인 어떤게 맞는걸까요?

전 처음에 바이오연료가 화셕연료보다 깨긋할거다라고생각하지만
바이오연료가 더 많은 온실가스를 내보낸다고 나오니까
화석연료보다 바이오가 더 온실가스를 내보낸다 이렇게 설득하는걸로 생각했는데,,
답변해주세요!!