Earth Day was started in 1970 in order to get people thinking about the environment and the urgent need to protect it.
That hasn’t gone so well. We’ve since emitted more carbon dioxide than we previously had in all of human history, likely dooming our planet to a potentially catastrophic amount of warming in the coming decades.
But it’s not all bad news: we’ve also successfully brought a few species back from the brink from extinction, discovered many new ones, and learned all sorts of fascinating things about the Earth in general.
Here’s a list of some of the most important, intriguing, and upsetting things we’ve learned about the planet since the last Earth Day.
Learn the 7 things here http://www.vox.com/2014/4/22/5637222/7-things-weve-learned-about-earth-since-the-last-earth-day