Hello!
The answer to your question is: Adding -s.
That is true! I hope this helped you! :)
Answer:
He huffed and puffed louder than ever and said - "Sorry I'm late Ma'am"
Completely unrelated, but that is a great sentence, I want that painted as a quote on my wall.
Also, the punctiation seems right to me. But you might be able to use a ";" instead of a comma, im gonna check that real quick.
Answer:
Although GMOs use more land than other types of crops, they have better harvests, which has increased overall production.
Explanation:
Notice the answer includes "Although GMOs use more land than other types of crops," from Source 2 and "they have better harvests, which has increased overall production." from source 1.