Choose the word that best fits the sentence. The scientist was known for his prolific contributions to the field of genetics.

Read the following passage and answer the question below: "The climate in the region has been changing rapidly over the past decade. Winters have become harsher, and summers are now much longer and hotter. These changes have had significant impacts on the local agriculture, with crop yields decreasing and farmers struggling to adapt to the new conditions." What is the main idea of the passage?