All life on Earth depends on the climate system. Every change in temperature, precipitation, air pressure, ice cover, and carbon cycles shape our environment—and the ecosystems and economies we rely on. By observing Earth’s signals, we can better understand our changing world, improve forecasts, and safeguard people and the planet. #NowForClimate: as weather becomes more extreme, 24/7 global observations must be reliable, consistent, and accessible—extending to every corner of the world. On #WorldEnvironmentDay, we recognize the WMO global community that works across meteorology, hydrology, ocean science, and climate services to help us understand the Earth’s signals—and help people, economies and the environment thrive.