The world appears to be betting on hydrogen being the future of energy:

🇬🇧U.K.: $664 million
🇪🇺EU: $550 billion

🇨🇳China, 🇯🇵Japan and 🇰🇷South Korea have also committed to huge amounts of spending on the gas 
The enthusiasm about hydrogen has a simple reason. Whether it’s burned to create heat or used in a fuel cell the only exhaust it emits is:

💦Clean water 
The worldwide race to dominate the various niches of a market is projected by some banks to be worth trillions of dollars by 2050.

But several hydrogen bubbles have been popped before:

There are daunting disadvantages:

🌎It doesn’t appear in its pure form on earth
🚛Hard to transport and store
❄️Must be compressed to 700 times atmospheric pressure or refrigerated at -253C
💥Likes to explode 
⚡️To get hydrogen, an electric current is run through water to split the oxygen and hydrogen atoms apart.

That takes energy, which really ought to be green 
One application currently gets a lot of hype: hydrogen-powered vehicles.

But on almost every count, vehicles powered by hydrogen fuel cells lose against their “clean energy” rivals — electric cars running on batteries 
For a start, hydrogen cars are only half as efficient:

If an electric car converts 86% of the energy originally harnessed by a wind turbine into moving the vehicle forward, the hydrogen car has access to only about 45% 
Compared to an electric car, a car with a hydrogen fuel cell:

⚙️Has more moving parts
💸More expensive to maintain
🔌Can’t be “reloaded” at home

That’s bad news for Toyota, Hyundai and Honda, who have placed the biggest bets on hydrogen in transportation 
🚆Hydrogen also doesn’t make sense for trains: It eliminates the need to electrify the track, but locks in a more complex, less efficient solution.

✈️It’s only long-haul flights or 🚢 oceanic shipping where hydrogen starts to make sense 
The solution to climate change is to power everything with electricity from renewable sources.

But that’s the problem: We simply can’t run everything on electricity. And we won’t ever have enough sun and wind to keep the lights on all the time, everywhere 
Here’s where hydrogen becomes useful.

It could be the fuel that picks up the slack whenever the clean power grids of the future can’t keep up 
It could look something like this:

↪️Electrolyze hydrogen when we have excess sun or wind
↪️Store it underground near our power grids, where it can be used during lulls in direct electricity generation

Hydrogen then makes decarbonization possible 
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