Title: Light-emitting diode.
Question: How much can a building's carbon footprint be reduced by switching to LEDs?

Title: Law of the United States.
Question: What did the lawmakers think of the increase in reports?

Title: Incandescent light bulb.
Question: What is the filament made of?

Title: Rajasthan.
Question:
Along with scarce green vegetables, what had an impact on Rajasthani cooking?