Frequently Asked Questions

What is Hydrogen?
Hydrogen (H2) is a gas, and like electricity, it's an energy carrier. Hydrogen doesn't emit any greenhouse gas emissions when it is used. However, hydrogen is also like electricity in that for it to be zero-emitting, it must be produced using clean energy.



What is the difference between green hydrogen, blue hydrogen, and grey hydrogen?
Do end-use appliances have to change when hydrogen is blended into the natural gas grid?
Most natural gas appliances and heating equipment can use a blend of up to 20% hydrogen. With concentrations higher than 20% of hydrogen in the gas grid, we'll need to start replacing appliance parts.

What challenges are we facing to develop a hydrogen economy in Atlantic Canada?
The development of a hydrogen economy is an exciting opportunity for the region, but it does come with its challenges. We are establishing a coordinated effort from energy partners across the region to ensure we solve the challenges together. Can you blend hydrogen into the natural gas distribution system?
Yes, up to about 20% without changing equipment and appliances. As the balance of delivered gas shifts closer to 100% hydrogen, equipment changes for end users will become necessary. Hydrogen-ready equipment is under development now and is becoming commercially available. Our modern gas distribution systems are mostly plastic, which can deliver 100% hydrogen. Some steel pipes may need to be replaced as hydrogen concentrations increase.

Is hydrogen safe?
Yes, hydrogen is very safe. It's light and quickly disperses in air. There are, however, risks to any energy delivery mechanism. The safety risks inherent to hydrogen are like those of natural gas. The gas industry has a strong safety record and is well positioned to address these risks.