These studies resulted in Report ITU-R RS.2178: The essential role and global importance of radio spectrum use for Earth observations and for related applications. It is stressed that information about climate, climate change, weather, precipitation, pollution or disasters is a critically important everyday issue forthe global community. Earth-observation activities provide such information, which is required for daily weather forecasting, climate change studies, environmental protection, economic development (transportation, energy, agriculture, and construction) and for safety of life and property. These systems are described in a number of ITU-R Recommendations. In particular, WP 7C has developed Recommendation ITU-R RS.188316 on the use of remote sensing in the study of climate change and its effects.