Plants convert energy from sunlight into chemical energy during a process called photosynthesis. This energy is passed on to humans and animals that eat the plants, and thus photosynthesis is the primary source of energy for all life on Earth. But the photosynthetic activity of various regions is changing due to human interaction with the environment, including climate change, which makes large-scale studies of photosynthetic activity of interest. New research from a team including Carnegie’s Joe Berry reveals a fundamentally new approach for measuring photosynthetic activity as it occurs around the planet. It is published this week by Proceedings of the National Academy of Sciences.