Identify the sentence that is punctuated correctly.

A. Although, the impact on our planet is clear global warming was not a high priority for many years.

B. Although the impact on our planet is clear, global warming was not a high priority for many years.

C. Although the impact on our planet is clear global warming was not a high priority for many years.

D. Although, the impact on our planet is clear, global warming was not a high priority for many years.

D

Incorrect.

The correct sentence that is punctuated correctly is D. "Although, the impact on our planet is clear, global warming was not a high priority for many years."

The correct sentence that is punctuated correctly is sentence D: "Although, the impact on our planet is clear, global warming was not a high priority for many years."

To find the correct answer, we need to look for the sentence that has proper punctuation. In this case, we are looking for the use of commas in the sentence. Sentence D is the only option that correctly uses commas to set off the introductory clause "Although," and also places a comma after "clear" to separate it from the rest of the sentence.