Q. Consider the following statements:

1. Of the two major ethanol producers in the world, i.e., Brazil and the United States of America, the former produces more ethanol than the latter.
2. Unlike in the United States of America where corn is the principal feedstock for ethanol production, sugarcane is the principal feedstock for ethanol production in Brazil.

Which one of the following is correct in respect of the above statements? (UPSC Prelims 2025)
Answer: Statement 1 is not correct but Statement 2 is correct
Notes: The correct answer is [D] Statement 1 is not correct but Statement 2 is correct. This question tests the specific production dynamics and feedstock choices of the world’s two largest biofuel producers.

• Production Volumes (Statement 1 – Incorrect): While Brazil is a pioneer in the ethanol industry, the United States of America is the world’s largest producer of ethanol. As of recent years, the U.S. produces significantly more ethanol (roughly 15 billion gallons annually) compared to Brazil (roughly 7–8 billion gallons). Together, these two nations account for over 80% of global ethanol production.
• Feedstock Differences (Statement 2 – Correct): The two countries utilize different primary feedstocks based on their respective agricultural strengths and climates:
  • United States: The industry is primarily based in the Midwest, where Corn (maize) is the dominant feedstock. Most U.S. ethanol is "starch-based."
  • Brazil: The industry is tropical and primarily uses Sugarcane. Sugarcane-based ethanol is often considered more energy-efficient because the yeast can ferment the sucrose directly, whereas corn starch must first be converted into sugar.

The distinction in feedstock also affects the "Carbon Intensity" of the fuel, with sugarcane ethanol generally having a lower carbon footprint than corn-based ethanol due to the processing methods and the use of sugarcane bagasse for power generation.