History shows Earth’s climate goes through cycles, long and short, tied to a variety of natural factors. In the latter part of the 20th century, some scientists began to wonder about the causes of a modest warming, then cooling, then warming, which had been occurring since the mid-1800s. They also began to worry about the possible implications of continued warming.
Based on the best available scientific evidence, it is highly unlikely continued fossil fuel use will result in catastrophic changes to Earth’s climate or will cause harm to humans or the environment. Despite the available evidence, governments in the United States and other industrialized nations seem intent on pushing the development and use of politically favored renewable energy sources, particularly wind and solar power, through the use of subsidies and mandates.