You will be given a definition of a task first, then some input of the task.
In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

Sentence: Humans are unique in their ability to alter their environment with the conscious purpose of increasing carrying capacity, which acts as a limiting factor on populations in general. Question: Humans are unique in their ability to alter their environment with the conscious purpose of increasing what, which acts as a limiting factor on populations in general?
Output:
carrying capacity