The author writes, “Gerardo Ceballos, a researcher at the Universidad Nacional Autonoma de Mexico in Mexico City, acknowledged that the study is written in usually alarming tones for an academic research paper. ‘It wouldn’t be ethical right now not to speak in this strong language to call attention to the severity of the problem,’ he said.” a)What evidence in the article supports the claim that this is a severe problem?

b)We often think of scientists as being objective. Do you think scientists have an ethical obligation to speak out when a problem seems so severe?