Understanding the natural world and human perturbations to it requires data. All data has inherent biases and constraints. In this class we will explore the world of environmental data from the perspective of those interested in affecting positive change. The class will use case studies and current research to explore topics such as: How do environmental scientists design studies or experiments to answer specific questions? How do we characterize the limitations of the data we have and work within these constraints to answer scientific questions and make informed and meaningful decisions?