With reference to green hydrogen, consider the following statements: 1. It can be used directly as a fuel for internal combustion. 2. It can be blended with natural gas and used as fuel for heat or power generation. 3. It can be used in the hydrogen fuel cell to run vehicles. How many of the above statements are correct?

Let's consider the statements regarding green hydrogen:

1. It can be used directly as a fuel for internal combustion. This statement is correct. Hydrogen can be combusted in modified internal combustion engines, similar to how gasoline or natural gas are used. Such engines are being developed for applications in heavy-duty transport (trucks, buses) and other sectors.

2. It can be blended with natural gas and used as fuel for heat or power generation. This statement is correct. Hydrogen blending involves injecting a percentage of hydrogen into existing natural gas pipelines. This blend can then be used in gas turbines, industrial boilers, and even residential heating systems, reducing the carbon intensity of the fuel mix.

3. It can be used in the hydrogen fuel cell to run vehicles. This statement is correct. This is a well-established and growing application for hydrogen. In a hydrogen fuel cell, hydrogen reacts with oxygen to produce electricity, with water as the only byproduct. This electricity then powers an electric motor in Fuel Cell Electric Vehicles (FCEVs), offering zero-emission transportation.

All three statements are correct, highlighting the versatile applications of green hydrogen as a clean energy carrier.