Environmental Effect has now grown a peril to the very existence of life on planet earth. Carelessness over climate change and its effect over the last five decades caused some Irrecoverable costs and harm to our environment. The warm climate that dominated Europe in the summer of 2019 is just the beginning of a Tsunami, which will conquer and affect all people and aspects of this planet. However, this is likely to a doomsday view and somehow unacceptable, but it can be the earth's future. However, climate change is affected by many factors, but emissions are the most effective ones. Moreover, the power sector is one of the leading producers of greenhouse gas (GHG) emissions. In this book, the interactive effect of energy and environment on each other is studied. This book's innovation is to introduce a new index of climate change reliability factor, which presents the reliability of each electricity generation technology and its capability in the climate change impact mitigation mitigation process.