What Is Green Hydrogen?

Green hydrogen is "the production of hydrogen through non-fossil fuel sources.” It produces zero greenhouse gases because it uses solar power or water vapor.

There are two ways to make green hydrogen: electrolysis and photolysis (or artificial photosynthesis).

Electrolysis is the process of breaking water molecules into hydrogen and oxygen gas through an electric current. The splitting of water molecules into hydrogen and oxygen gas using sunlight is called photolysis.

Once the green hydrogen is made, it can be used in cars that run on compressed natural gas (CNG) or liquid natural gas (LNG). It can also be used for electricity or heat.

Green hydrogen is the cleanest fuel ever to hit the market. It does not pollute the environment with greenhouse gases, and its production requires water vapor or solar power.

Green Hydrogen vs Blue/Gray Hydrogen

Hydrogen is often touted as a clean and sustainable fuel source, but there are different types of hydrogen.

Blue/Gray hydrogen is created by using fossil fuels to generate the energy needed to split water. Fossil fuel combustion produces greenhouse gases, which contribute to climate change. Additionally, because this process uses fossil fuels as an energy source, it does not result in truly clean hydrogen fuel.

Green hydrogen is created using water vapor or solar power to split water molecules, making a clean, renewable energy source. Green hydrogen fuel does not contribute to climate change and can produce heat or electricity, both of which have lower carbon footprints than fossil fuel-based alternatives.

Uses of Green Hydrogen

Green hydrogen has several uses that benefit human beings and the environment, such as:


Green Hydrogen as Fuel

The most common use of green hydrogen is to use it as a fuel in cars. Two types of vehicles run on hydrogen: those that run on compressed natural gas (CNG) and those that run on liquid natural gas (LNG).

These cars produce zero emissions, which is excellent for the environment. In addition, hydrogen fuel cells have a much longer driving range than electric cars, making them a more practical option for long-distance travel.

Green Hydrogen in Industry

The chemical, petrochemical, and steel industry are other areas where green hydrogen can have significant uses. Green hydrogen can be used in traditional fossil fuels to create heat or electricity.

This reduces greenhouse gas emissions and lowers a company's operating costs. In addition, green hydrogen can create ammonia, a crucial fertilizer ingredient.

Green Hydrogen in Domestic Use

Green hydrogen can also be used in domestic settings, such as powering homes or heating water. This not only reduces greenhouse gas emissions but also saves on energy costs.

Advantages of Green Hydrogen

There are several advantages of using green hydrogen as a fuel source. These include:

100% Sustainable

Unlike other fuel sources, such as fossil fuels, green hydrogen is sustainable. It can be produced using solar power or water vapor, making it a renewable resource.

Moreover, it does not produce any greenhouse gases in the process.


Green hydrogen can be stored in a tank and used when needed. This makes it a more practical fuel source than renewable energy sources like solar or wind power, which cannot be stored and requires immediate usage when generated.


Green hydrogen is versatile, meaning it can be used for various purposes. Green hydrogen can create heat or electricity. In addition, it can be used in cars, homes, and industry, making it suitable for numerous applications.


Green hydrogen is also transportable from place to place as needed. This makes it ideal for use in areas where traditional fossil fuels are not available or where there is a need for a clean and sustainable fuel source.

Disadvantages of Green Hydrogen

While there are many advantages to using green hydrogen, some disadvantages must be taken into account, such as:

High Cost

Compared to traditional fossil fuels, producing green hydrogen is more expensive. This is because producing green hydrogen requires special equipment and processes.

It also requires more energy to split water molecules using solar power or water vapor. In addition, the cost of installing this necessary infrastructure may be prohibitive for some companies or individuals.

High Energy Consumption

Producing green can prove costly because it requires a lot of energy. This is because splitting water molecules to create hydrogen involves an energy input.

To generate enough green hydrogen to power a car, for example, you would need an industrial-sized solar panel or wind turbine. This can be prohibitive for some people or businesses.

However, as green technology becomes more widespread, the amount of energy required to produce green hydrogen is expected to decrease.

Safety Issues

Green hydrogen is a relatively new technology, and some safety concerns still need addressing. Hydrogen is a highly flammable gas and dangerous if not handled correctly.

In particular, there is some concern that green hydrogen could be used to create explosives or as a weapon. However, proper safety measures minimize these risks.


Ways Forward

Green hydrogen has the possibility of revolutionizing the way we fuel our cars and generate electricity, making it an exciting new technology.

While there are some disadvantages to using green hydrogen, the advantages outweigh them by a wide margin.

To maximize the benefits of green hydrogen, however, it remains essential to overcome the current challenges. To do this, the following can be adopted:

  • Developing new technologies that make green hydrogen production more affordable and efficient
  • Encouraging the use of green hydrogen in transportation and industry
  • Improving safety standards for green hydrogen

Green hydrogen will likely become more accessible with continued development, making it a viable alternative to fossil fuels.


1. What is green hydrogen?

Green hydrogen is created by splitting water molecules using solar power or water vapor. It does not produce greenhouse gases since it is a clean and renewable energy source.

2. How is green hydrogen different from blue/gray hydrogen?

Blue/gray hydrogen is created by splitting water molecules using a chemical reaction. Splitting water molecules using solar power or water vapor produces green hydrogen. It is a sustainable fuel source, while blue/gray hydrogen is not.

3. What are some uses for green hydrogen?

Green hydrogen can fuel cars, generators, and other industrial applications. It can also heat water or generate electricity.

4. What are the advantages of green hydrogen?

Green hydrogen is a clean and sustainable fuel source that does not produce greenhouse gases. It is storable, versatile, and transportable, making it an ideal fuel for use in cars and other vehicles.

5. What are the disadvantages of green hydrogen?

Green hydrogen is more expensive to produce than blue/gray hydrogen. It also requires more energy to split water molecules into hydrogen gas. However, as green technology becomes more widespread, these disadvantages will likely reduce.

Attend Our Next Webinar

Attend Our Next Webinar

Join our next Sustainable Investing 101 webinar, get our favorite DIY options, and walk through how we build our portfolios.

Watch Now
Get Our Newsletter

Get Our Newsletter

Go a level deeper with us and investigate the potential impacts of climate change on investments like your retirement account.

Talk To A Human

Talk To A Human

Joining a new investment service can be intimidating. We’re here for you. Click below to email us a question or book a quick call.

Ask a Question


Sustainable Investing Topics

View our list of some topics below.