You may refuse to believe — or just ignore — the facts about global climate change. But that won’t change the fact that the world is changing, in ways that will affect all of us, sooner or later. (And the way we’re tracking, it’s going to be sooner.)

The Amazon, the planet’s air conditioner, is on the fritz.

In Mexico City, they’re imposing severe restrictions on water use because the reservoir is so low.

In an area of Spain, the reservoir has already dried up, and residents there have to get their water by truck.

Here’s the good news: if you’ve got $7 to spare, you can help save the planet.

You can install this gadget (Home Depot has one too) in about five minutes (it goes in between the pipe and the shower head). Push the button and the water flow slows to a trickle — but maintains your current water temperature — so you’re not wasting gallons of water while you’re shampooing, lathering up, shaving, etc. Push the button again and the regular flow resumes so you can rinse off. Easy-peasy.

It’s not as dramatic as this:

But it’s just as effective.

For a mere $7, you could easily save about 10 gallons of water every time you shower. You won’t just be saving water, you’ll be saving the planet. I’ll drink to that!