Led by atmospheric physicist John Latham and engineer Stephen Salter, the team attempted a Cloud reflectivity enhancement experiment. Their goal was to make clouds more reflective to bounce more of the Sun's heat generating rays back into space as a stop-gap against global warming. By changing the size of water droplets within a cloud, they make clouds brighter and reflect the Sun's heat into space. They choose to seed marine stratocumulus clouds because of their commonality around the world and the fact that they are low-lying, making it easier for man-made droplets to reach them. The Project Earth team uses the potassium chloride and sodium chloride from (salt-based) flares to form droplet particles that are one micrometre in diameter, and that can rise to 300 ft (91 m), even in adverse (cloudless) conditions. The experiment proves that man-made droplets can indeed seed stratocumulus clouds.