QUESTION: Generate a question with a factual answer?

ANS: What date marked the first law restricting greenhouse gas emissions?

QUESTION: Generate a question with a factual answer?

ANS: How large is the metro system of Mexico City?

QUESTION: Generate a question with a factual answer?

ANS: What sector provides about a quarter of Southampton's available jobs?

QUESTION: Generate a question with a factual answer?

ANS:
When were anti-miscegenation laws passed?