Did you know that more than 500 million people watch videos on Facebook every day? That's over half a billion people—a lot of eyes on a lot of important content.

We took a trip down Facebook memory lane to check out the videos Climate Reality supporters watched most. They're an incredible reminder of how far we've come in the past year—and of how much work we have left to do in the fight against climate change.

Take a look back at our top five viewed videos of 2017—and be sure to watch the ones you may have missed!

5. A … Wind Energy Island?

Germany, the Netherlands and Denmark have worked together on plans for an island that would collect energy from thousands of new wind turbines at sea. This blustery island would provide clean energy to a whopping 80 million people! To top it all off, the island will also have solar farms—taking advantage of the sun for even more renewable energy generation. Working together sure pays off!

4. A Taiwanese Skyscraper Full of Thousands of Trees

Twenty-one stories tall … 23,000 live plants … and the ability to absorb 130 tons of carbon dioxide per year. You have to watch the video to believe this incredibly sustainable skyscraper recently built in Taiwan—beautifully marrying design and sustainability.

With as many trees as New York City's Central Park, this groundbreaking new skyscraper is inspiring others in the built environment industry to follow suit with plans for forest cities—new developments that are also helping to fight climate change. Put our names on the waiting list for an apartment!

3. Norway Commits to Cutting Down Deforestation

Norway? More like No-Way! The Norwegian government is the first in the world to commit to no longer buying products that contribute to deforestation. By saying no to these harmful products and yes to firms with real sustainability policies, the country's government is not only saving crucial habitat for endangered species around the world, it could make a huge difference in the fight for a safer climate for all. Here's hoping other countries go the same way!

2. Tesla's Solar Panels (and Batteries) Help Power Hawaiian Island, Even at Night

Tesla is supplying the island of Kauai with thousands of solar panels and hundreds of batteries on a new farm that will power the island, even at night—eventually saving roughly 1.6 million gallons of diesel fuel a year. Add this to the list of ways Tesla is changing the game when it comes to energy—lighting up the world sustainably day and night.

1. These High-Efficiency Solar Panels Roll Out

Finally, for our most-viewed video of the year, we look to the UK-based renewable energy startup Renovagen. The innovative group has created rollaway solar panels that can be transported anywhere by vehicle—perfect for bringing instant power to disaster areas where they're needed most. It's no surprise our supporters loved this video.

Bonus Video!