At the airport in San Jose, Costa Rica, they launch the weather balloons with Hydrogen. They don't use Helium because they can't afford it. I am not ready to share the road in California with hydrogen-fueled cars.
Earlier, I forgot to show the balloon ascending into the stratosphere. Special thanks to Radiosondista Victor Hernandez for planning ahead. He suggested that a globo negra would photograph better than a white one against an overcast sky.
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