Secretary of State John Kerry warned on Monday that scientific evidence for climate change is “irrefutable” and “alarming.”

He also urged the international community to take action to stop it.

“The science is clear. It is irrefutable and it is alarming,” he said in a video address broadcast at a a climate conference in the Marshall Islands, according to AFP.

“If we continue down our current path, the impacts of climate change will only get worse.”

Kerry said that climate change is a global problem and nations must work together to take immediate action to prevent any further harm to the Earth.

“I stand with you in the fight against climate change,” he told attendees.

“If we act together, there is still time to prevent some of the worst impacts of climate change,” Kerry added. “But the people of the Pacific Islands know as well as anyone that we also need to prepare communities for the impacts that are already being felt.”