Some of you may not be familiar with this, but it's a technology that involves extracting and recovering carbon dioxide at an onshore plant and then sealing it deep within the earth's layers.
động từto enclose and seal in an envelope or something similar; put in an envelope
động từcontain and seal
Ví dụ
これ、百二十五万件、手紙を出すだけでも、これを封入するだけでも大変ですよね。大変ですよ。Sending 1.25 million letters, and even just putting them in envelopes, must be a huge task. It's a lot of work.