Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Question: What are prokaryotic cells filled with? Answer: cytoplasm
cytoplasm. Like all other cells, prokaryotic cells are filled with cytoplasm. It includes watery cytosol and other structures.

Question: What long molecules are composed of chains of units called monomers? Answer: polymers
Polymers are long molecules composed of chains of units called monomers.

Question: What does the kyoto protocol focus on controlling? Answer: greenhouse gas emissions
The Kyoto Protocol is another worldwide agreement on air pollution. It was passed in 1997. The Protocol focuses on controlling greenhouse gas emissions. Its aim is to control global warming.