Consider the following hydrogen production options:
- Blue hydrogen is made from CH4 where CO2 is captured and stored.
- Green Hydrogen is made from renewable energy and no CO2 is emitted.
- Brown Hydrogen is made from coal where CO2 is emitted to the atmosphere.
- Grey hydrogen is made from CH4 and CO2 is captured and liquefied.
Which of the above statements are correct?
1, 2 and 3 only
1, 2 and 4 only
2, 3 and 4 only
All are correct