With reference to the Ethanol Blended Petrol (EBP) Programme, which of the following are valid concerns frequently raised?
1. Diversion of food grains for ethanol production may affect food security.
2. Increased sugarcane cultivation for ethanol may lead to water stress in certain regions.
3. Higher ethanol blending may damage older vehicle engines not designed for it.
Which of the statements given above is/are valid concerns?