Views on Global Warming ?

Public opinion on climate change is the aggregate of attitudes or beliefs held by the adult population concerning the science, economics, and politics of climate change. It is affected by media coverage of climate change

Explanation: According to the Pew Research Center 74% consider climate change to be a serious problem and 77% say that it is harming people now, 20 points higher than the global median. The same study showed that 63% of people in Latin America are very concerned that climate change will harm them personally.

the dark variety, as they are not visible on the dark tree barks

explanation:

it's c. (to reduce the greenhouse effect/carbon gasses)