Chemistry Lab

In the lab his first question was - how do you figure out the throttle pressure of IC engine? Have you ever figured out their design? their fuel? Bio ash? Why ozone layer isn't sustaining?
We were maintaining silence. He repeated again - why do I need to visit forest? and for how long? any answer through data science?
She smiles at him and replies - based on previous data, this earth was suffering from this disease since early of this century....