For instance, to protect the rapidly thinning ozone layer, the United Nations Environmental Program is encouraging countries to sign the Montreal Protocol. Under the terms of the Protocol, all signatories agree to reduce their use of chlorofluorocarbons, and any nations not willing to sign may be subject to economic sanctions. But the R.O.C.
譬如聯合國環境規劃署為保護日益稀薄的臭氧層而發起簽訂「蒙特婁公約」，在此公約中，所有國家都要遵守協定，減少氟氯碳化物的使用；對於不願參加公約的國家，則施以經濟制裁。