In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[Q]: Question: If North America is larger then Asia, which continent experiences less trash buildup? 
 Answer: Asia
[A]: The Southern Hemisphere has less trash buildup in the oceans because less of the region is continent.


[Q]: Question: Mike needed to get a dark picture . In order to get the darkest photo, Mike made the exposure 
 Answer: shorter
[A]: The longer the exposure, the more light that the telescope can gather to make the image.


[Q]: Question: Polly gets her planet to reduce greenhouse gas levels. The global temperature as a result likely 
 Answer: decreases
[A]:
A decrease in greenhouse gas levels decreases global temperature and an increase raises global temperature.