Remember when the ozone layer had a huge hole in it? Now it’s shrinking! Here’s what happened…

The ozone layer is high in the atmosphere and shields us from radiation. But in the early 80’s scientists noticed the ozone above the south pole was depleting…. fast. Scientists suspected that chemicals in everyday products were rising into the atmosphere and destroying ozone molecules.

So scientist Susan Solomon led an expedition to the south pole and proved that the chemicals, called chlorofluorocarbons, were to blame. Her work became the basis for the UN Montreal Protocol, which banned chlorofluorocarbons in 1987.

Since then, emissions have dropped dramatically and the latest data from NASA satellites shows that the ozone layer is recovering!

Subscribe for more optimistic science and tech stories!

#animation #ozone #optimism #science #tech

Share on

I have a question: Why can’t I vote online? I bank online! Over the past two months, I called up a bunch of voting and security experts to try answer that question. And the answer is more controversial, complicated, and high stakes than I could have ever imagined. Here are a few of the reasons why – and we made a whole longer video about it, out now!

There is a future where we could vote online. But in the meantime, GO VOTE.

#tech #science #cybersecurity

Share on