Although aerogel is classed as a solid, 99% of the substance is made up of gas, which gives it a cloudy appearance.
2
这些岛屿周围具有丰富的渔类资源，矿产资源并可能有石油和天然气储量。
The islands have rich fishing grounds, mineral deposits and possibly oil and gas reserves.
3
页岩气所排放的温室气体主要有两类：燃烧产生的二氧化碳以及页岩气井开采过程中的甲烷泄漏。
Greenhouse gas emissions from shale gas are predominantly down to two things: carbon dioxide produced when the gas is burned, and methane that leaks out while the well is being exploited.
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