Lightning in volcanic ash
If a volcanic eruption is not impressive enough already, try seeing it when lightning is involved. Normally ash and dust are electrically neutral. However, when the two elements are emanating from a volcano they are (obviously) very hot, and can have positively and negatively charged ions. These in turn cause electric and magnetic fields, with the result that the positively and negatively charged ions separate from each other. This process can then add severe lightning to a volcanic ash cloud.
By 2050, Earth will likely be home to more than nine billion people. That's a lot of mouths to feed. In a special eight-month series, “The Future of Fo... More By 2050, Earth will likely be home to more than nine billion people. That's a lot of mouths to feed. In a special eight-month series, “The Future of Food,” National Geographic investigates how to meet our growing need for nourishment without harming the planet that sustains us. Join the discussion in National Geographic magazine and online at http://food.nationalgeographic.com/.
Date 14-04-18, Duration 1:30, Views 660
Latest tech videos
How quick are you to adopt new technologies?
Thanks for being one of the first people to vote. Results will be available soon. Check for results
- I'm a tech-head — first in line to buy the latest and greatest.
- I'll typically wait for the first wave to pass and the bugs fixed before diving in.
- If it ain't broke, don't fix it. I hang on to my tech goodies for good reason.
- I'm still using a VCR and my late '90s flip phone.