Prior to the 1987 Montréal Protocol, There Existed Some Uncertainty

question 9

Multiple Choice

Prior to the 1987 Montréal Protocol, there existed some uncertainty in the scientific community as to the magnitude of ozone depletion caused by CFCs in the atmosphere. Nevertheless, the Protocol did recommend phasing out CFCs from refrigerants and other uses because the potential consequences of not doing so were so severe. This is an example of applying the _______________ principle.

• A) uncertainty
• B) guilty-until-proven-innocent
• C) precautionary
• D) utopian
• E) better-safe-than-sorry

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Definitions:

Rods

Photoreceptor cells in the retina of the eye that function well in low light and are responsible for night vision.

Cones

Photoreceptor cells in the retina of the eye that function best in bright light and enable the perception of color and fine detail.

Dark Adaptation

The process by which the eyes increase their sensitivity to low levels of light, allowing for better vision in the dark.

Rods

Photoreceptor cells in the retina of the eye that are sensitive to low light levels and are primarily responsible for night vision.