In this book, Michel Innocent Peya focuses on "climate finance" and the withdrawal and return of the world's leading power, the United States, in the battle against climate change, by assessing its real financial impact in order to fight collectively against the ultimatum given by nature. The States are determined to take up the challenge and assume their responsibilities, as the Biden administration has done, in order to wage the "people's battle" against global warming and the perils that it may cause in the medium term. A vibrant appeal is launched to all the world's decision-makers as well as to state and non-state actors. As the years go by, the planet is experiencing rising temperatures and precipitation is constantly increasing. These are the results of a multiform pollution that threatens the existence of nations. Our beautiful nature is being devastated by greenhouse gas emissions and ever-increasing waste. The few world powers, those that can be qualified as major polluters, are few in number but threaten the balance of our system to the detriment of collective well-being. What will become of our planet, our environment, if the community of polluters continues to refuse to take its responsibilities?