Just days before the UN Climate Action Summit, over 250,000 people gathered for the global climate strike in New York City, where local climate activists such as Alexandria Villaseñor and global climate figure Greta Thunberg addressed the crowd.

Here are some images from New York City’s Global Climate Strike.

Though centered around the youth, the global climate strike in New York City featured protesters of all ages.

Ivy, age 9, and Ruby, age 12

Elizabeth and her niece Khloe, age 10

Many posters at the strike spoke to the sense of urgency around the climate crisis.

One of the messages Greta Thunberg emphasizes and that climate strikers made sure was present: “Unite behind the science.”

And of course, it wouldn’t be a youth climate strike if there weren’t some memes involved.