气氛is little like an atmosphere; a mood; a flavour; an ambience , After the revolution, the climate of the country remained tense. 革命以后,那个国家的气氛依然紧张 环境is environment, conditions or circumstances For example: 国际环境日 World Environment Day (WED) 恶劣环境 adverse circumstances

you are right 气氛 氛围 = atmosphere feeling in the mind that is created by a group of people or a place 环境 = environment, circumstance the natural feature or condition in which people, animals and plants live

气氛主要形容人的心态，比如：晚会的气氛很热烈； 环境可以指人生活的周围的事物：天气、污染、等