Does a hydroelectric power plant emit less CO2 than a thermal power plant is the right question which should be asked.
This is a situation which occurs when carbon dioxide (CO2) and other gases accumulate in the atmosphere thereby absorbing sunlight and solar radiation and increasing the temperature on Earth.
In building a hydroelectric power plant, we need to ask if it emits less CO2 to reduce global warming.
Read more about Global warming here https://brainly.com/question/74336