But how the “greenhouse effect” operates and why such a tiny proportion of CO2 has such a harmful effect are still the two most puzzling questions haunting natural scientists today.
But how the “greenhouse effect” operates and why such a tiny proportion of CO2 has such a harmful effect are still the two most puzzling questions haunting natural scientists today.
但是，温室效应怎样起作用，如此少量的二氧化碳为什么会具有如此有害的效应，仍然是两个最令自然科学家魂牵梦绕迷惑不解的问题。