Make: Volume 90

Only once have I had to chase a neutrally buoyant

payload down the road!

5. CLOSE BALLOON

Tie it off with rubber bands and electrical tape

(Figure

E

) and attach the payload if you have one.

Bowlines are a great knot for this, and there’s a

detailed guide at highaltitudescience.com/pages/

tying-off-a-weather-balloon.

6. LAUNCH!

Letting a balloon go (Figure

F

) is even more fun

when it’s fighting global warming. :)

we have a meaningful impact on global warming,

but it feels great to have started something

fundamentally new that needed to be started —

a hot opportunity, you might say.

You probably have questions; much of the

internet did, too. Tomas ...