Correct Option
Statement 1 is correct. Green hydrogen can be directly utilized as a fuel in internal combustion engines. This application typically requires modifications to the engine design to accommodate hydrogen's combustion properties, and while feasible, it is generally considered less efficient than fuel cell applications.
Statement 2 is correct. Green hydrogen can be blended with natural gas (a process known as hydrogen blending or power-to-gas) and subsequently used in existing infrastructure for heat and power generation. This includes applications in industrial furnaces, boilers, and conventional power plants, facilitating a gradual decarbonization of energy systems.
Statement 3 is correct. A significant application of green hydrogen is in hydrogen fuel cells. These electrochemical devices convert the chemical energy of hydrogen into electrical energy, which can then power electric motors in vehicles, providing a clean and efficient alternative for transportation with water as the only byproduct.
Incorrect Options
Options (1), (2), and (4) are incorrect because all three statements provided regarding the uses of green hydrogen are factually accurate. Therefore, the correct assessment is that "All three" statements are correct.