instruction:
In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
question:
Question: What has increased the greenhouse effect? Answer: human actions
answer:
Human actions has increased the greenhouse effect.


question:
Question: What is defined as the temperature plus precipitation of an area over a long period of time? Answer: climate
answer:
The climate is defined as the temperature plus precipitation of an area over a long period of time.


question:
Question: What isotope of carbon is typically used to date ancient items? Answer: carbon 14
answer:

Carbon 14 isotope of carbon is typically used to date ancient items.