This chapter looks at if and how the consumption and sharing of (mis)information are shaped by the environments that we use to communicate. Most people have heard of terms such as “echo chambers” and “filter bubbles,” but what are they exactly? And how prevalent and problematic are they in our internet-addled times? The question of whether echo chambers and filter bubbles have contributed to the spread and prevalence of misinformation is not at all obvious. This debate is ongoing, and where you land on this spectrum may affect what solutions you believe are required. This chapter offers a balanced perspective, discussing the arguments for and against the notion that echo chambers have serious implications for the spread of misinformation, polarization, and democracy.