Answer:
<u>public policy</u>
Explanation:
<u>Public policy:</u> In social sciences, the term "public policy" is determined as a specific process through which the government tends to translate its various political vision into different actions and programs in order to deliver the desired changes to its people and outside world. It generally consists of a combination of rules and regulations, policies, laws, etc.
<u>In the question above, the given statement represents public policy.</u>
Answer:
ice glaciers melting
erosion of the ozone layer
air pollution
oil in the ocean and trash in the ocean
Yes, I think that identifying the purpose would increase the credibility of the source, so if we understand the "should" here as "would be good if, is recommended" - then this statement is true.
Including the intent of the information in the source will help place the information in a wider context - and often the context is necessary to fully understand the content of a source.