Chris Hadfield

And so if you look at a company, for example, like GHGSAT,

GHG stands for greenhouse gas.

And what they developed is a really clever little sensor that specifically looks for the gases like methane that contribute most to changes in the chemistry of our atmosphere and therefore the greenhouse effect that leads to global warming.

And GHGSat is a very successful company.

And

And they're leading the world.

And what they do is they orbit the world and constantly, 24-7, look for unknown sources of big methane leaks and then inform the person that owns the pipeline or the plant or whatever.

There's a company like Planet that has hundreds of satellites up that are imaging the world down to very fine resolution every day.

And they do a lot of what you would have to call altruistic work to try and

let everybody see the actual health of our planet and what's going on.

And so it's a big enough industry, multi, multi-billion dollar industry, that there's lots of different areas in it that you can choose to support by investing in certain companies.

I'm a semi-autonomous rover myself.

Yeah.

One of the first ones you touched on, Whitney, which is reusable rockets.

Right now, we have partially reusable rockets.

The first stage that gets you off the launch pad and above the air so that then you can go fast enough.

You know, in order to stay in orbit, you have to go five miles a second, eight kilometers a second.

You can't do that down here in the air.

There's just too much friction.

but as soon as you get above the air then you can go sideways and accelerate out to orbital speed and so that first stage that does the heavy lifting gets you off the pad gets you up uh you know where there's virtually no air and then it runs out of fuel and spits you off