Compressed leaf heating pellets.
<video controls autoplay loop style="max-width: 100%;">
<source src="https://diqn32j8nouaz.cloudfront.net/tooltalk_17712237900454.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Previously:
Gas-fed train track heating system - GIF
Hair dryer heating element winder - GIF
Heating a fruit farm to avoid frost damage - GIF
Heating pipes being cleared - GIF
Self heating lunch boxes in Japan - GIF
