地球工程故意改變地球的氣候，對許多人來說，是一個(gè)危險(xiǎn)的、可怕的提議。但這一概念近年來吸引了越來越多的興趣，因?yàn)樗锌赡茱@著改變限制未來氣候變化幅度的各種選擇組合。與大多數(shù)減少溫室氣體排放的方法不同，一些地球工程方法可以證明是快速有效和廉價(jià)的，并且可以由一個(gè)或少數(shù)國家在沒有全球合作的情況下使用。Tese的特點(diǎn)對風(fēng)險(xiǎn)管理、國家安全和國際治理提出了重大挑戰(zhàn)，這些挑戰(zhàn)才剛剛開始被認(rèn)真考慮。

Geoengineering—the deliberate altering of the earth’s climate—represents a risky and, for many, a frightening proposition. But the concept has attracted increasing interest in recent years because of its potential ability to signifcantly transform the portfolio of options for limiting the magnitude of future climate change. In contrast to most approaches for reducing greenhouse gas emissions, some geoengineering approaches could prove fast acting and inexpensive and could be deployed by one or a small number of nations without global cooperation. Tese characteristics present signifcant challenges for risk management, national security, and international governance that have only just begun to be seriously considered.