If I were to read " Stop the Spread of Superbugs" I would ask " I would ask what are Superbugs and how did they start spreading in the first place?"
On the second one I would ask, "How would resisting antibiotics be a threat in 2013?", and " Was here a virus that started?"
Answer:
Volcanic eruptions are dangerous.
Earthquakes are dangerous.
Floods are dangerous.
Tsunamis are dangerous.
Explanation:
Okay, so as long as you have certain conditions, it can be a sentence. Therefore, you can spend a quick amount of time writing these. You need a noun and a verb, which is why these are quick.