detest, desolate, destabilize; so, as, such Human activity has already begun to ______ the global climate, ______ greenhouse gases reach levels that are higher than they have been for 20 million years.
detest, desolate, destabilize; so, as, such Human activity has already begun to ______ the global climate, ______ greenhouse gases reach levels that are higher than they have been for 20 million years. 【正确答案】：destabilize; as
