Top UN officials launched a new global campaign to tackle the climate emergency on Tuesday, with social media influencers, indigenous leaders and corporate giants showing what they've done and what's to come.

Climate Promise 2025 aims to accelerate efforts from the local to the international level to take more ambitious steps to ensure that the global temperature does not rise above 1.5°, the target set in the 2015 Paris Agreement on climate change.

UN Secretary-General António Guterres said the initiative, led by the United Nations Development Program (UNDP), recognizes an important truth in the fight against climate change: "it's not all doom and gloom."

"Many countries have the will to take more ambitious climate action, but the world needs to mobilize to make sure there is a way," he said at the Under 1.5 by 2025: Launch event plan.

Hosted by actor Ato Essandoh, the event featured talks and pledges to action interspersed with videos broadcast from around the world, echoing a chorus of calls for world leaders to join in and keep the pledge. (More on news.un.org)