Roughly a quarter of Americans have used ChatGPT since the chatbot’s 2022 release, according to the Pew Research Center — and every query exacts a cost. Chatbots use an immense amount of power to respond to user questions, and simply keeping the bot’s servers cool enough to function in data centers takes a toll on the environment. While the exact burden is nearly impossible to quantify, The Washington Post worked with researchers at the University of California, Riverside to understand how much water and power OpenAI’s ChatGPT, using the GPT-4 language model released in March 2023, consumes to write the average 100-word email.