About 87 percent of all human generated carbon dioxide emissions come from the combustion or burning of fossil fuels like coal, natural gas and oil. Carbon dioxide emissions, largely by-products of energy production and use, account for the largest contributor of greenhouse gases, which are associated with global warming is measured in kt (kiloton) often calculated and reported as elemental carbon. This article will study and present each of these three fossil fuels separately to know about their reserve, production, consumption, price, and their corresponding emissions. The analyses will be carried out at the country and global levels to reveal and identify the potential contributors of the emissions and make recommendations to reduce the global temperature rise. Also, the impact of fossil fuels on climate change of our planet will be studied and presented. Furthermore, how global warming above C threshold level is impacting the rise of sea level, creating extreme weather condition, biodiversity loss and species extinction, as well as food scarcity, worsening health and poverty for millions of people worldwide will be thoroughly investigated.