U.S. President Barack Obama used his weekly address to focus on Earth Day, an annual event that recognizes the importance of protecting nature and our environment.

But the relatively laid-back vibe of the video, released Saturday, stands in stark contrast to Obama's urgent message.

"There's no greater threat to our planet than climate change," he says. "Climate change can no longer be denied or ignored."

The president's strong words came days before he is set to commemorate Earth Day during a visit to the Florida Everglades on Wednesday.