Answer:
1.-Chlorofluorocarbons and hydrochlorofluorocarbons are fully or partly halogenated paraffin hydrocarbons that contain only carbon, hydrogen, chlorine, and fluorine, produced as volatile derivatives of methane, ethane, and propane. They are also commonly known by the DuPont brand name Freon.
2.-Environmentalism and ecologism constitute one of the most recent ideologicalmovements. Though the terms are often used interchangeably, it is more usefulto regard ecologism as a philosophy that believes in a thorough-going root andbranch transformation of society, whereas environmentalism believes thatdangers to the environment can be tackled within the existing political, economicand cultural order.
3.The main gases responsible for the greenhouse effect include carbon dioxide, methane, nitrous oxide, and water vapor (which all occur naturally), and fluorinated gases (which are synthetic).
