Free Earth Day Guide — Yosemite Rivers Alliance
From the Moon, Earth looks like
one blue, fragile world.
Right now, astronauts circling the Moon can see our planet for what it really is. What they see — and what it means for the rivers in your backyard — is the story we want to share with you.
Why 71% water doesn't mean what you think
The Moon guides salmon home
160 miles from peak to tap
What the "overview effect" changes
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From the Moon to Your Tap
A short read that connects the biggest picture to your daily life — and the rivers that make both possible.
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Yosemite Rivers Alliance · yosemiterivers.org
What's inside the guide
The photograph that changed everything
How a single image from 1968 created the modern environmental movement — and what we're seeing again right now.
The rarest water on Earth
Earth is 71% water. But almost none of it flows in rivers. The fraction that does — that's what fills your tap every morning.
The Moon calls salmon home
The same gravity guiding the Artemis crew guides salmon up the Tuolumne River. It's one connected system — and it's fragile.
What you can do — right here
You don't need to go to space to feel the overview effect. You can stand at the edge of a river and begin to understand.
3M+
Bay Area residents drinking Yosemite river water
<1%
of Earth's water flows in rivers like these
40 yrs
protecting these watersheds — and counting
"Watch water moving downstream — water that fell as snow high in the mountains, that will pass through a bay, into the Pacific Ocean, into clouds, and eventually return as rain or snow. It is one continuous system. And we are part of it."
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