The GLOBE program studies the state of our planet and we are one of  2400 schools from over 111 diffrent countries participipating in this program. We measure the status of the atmospere, water, soil and vegetation within the vicinity of our schools.  The results can then be compared with other samples from around the world. In this was, hanges in the environment can be observed and documented. This data can be used in turn by scientists. Croatia has been part of the GLOBE program since 1995, and our school has been a member sinc November 2011. We have already compleated our first task – the observation of when leaves change their colours.