中文摘要：

全球变暖的主要原因是由于大量温室气体排放导致了温室效应，而温室气体的主要组成部分就是二氧化碳，因此二氧化碳应作为温室气体削减与控制的重点。论述了海洋储存二氧化碳与二氧化碳置换开采天然气水合物中甲烷的可行性及环境效应。该方法以固态二氧化碳水合物的形式储存大量的二氧化碳，有利于大大降低大气中二氧化碳的含量，有利于维护海底水合物沉积层的稳定性，有利于提高开采天然气水合物中甲烷的安全性，为二氧化碳水合物储存温室气体二氧化碳开辟了一条新的途径，对保护环境和经济社会的可持续发展具有重大的现实意义。

英文摘要：

The main cause of global warming is the emission of large amount of greenhouse gases, which led to the greenhouse effect. The main component of greenhouse gas is carbon dioxide. Therefore, reduction of greenhouse gases as carbon dioxide should be the focus of control. This article discussed feasibility and environmental effect of storing up carbon diox- ide in ocean and replacement of methane from hydrate with earbon dioxide. In this method, large amounts of carbon dioxide are stored in form of solid carbon dioxide hydrates. This will help significantly reducing carbon dioxide in the atmosphere, maintaining the stability of submarine gas hydrate deposits, and improving the safety of exploitation of methane gas hydrate. This has opened up a new way of storing carbon dioxide by carbon dioxide hydrate. It is a great significant both in environmental protection and sustainable development.