文字稿:

Meet the latest recruit in the war against global warming.

This Argentinian bull has a device attached to its back to prevent methane escaping when it belches.

The gas is collected from the bull's stomach through a small pipe and compressed in a canister. Every day one animal produces enough fuel to drive a car one kilometre.

According to the UN, 18% of greenhouse gas emissions are produced by livestock.

Vocabulary 词汇:

methane 甲烷，沼气

belches 打嗝（第三人称单数）

canister 金属罐子

greenhouse gas 温室气体

livestock 家畜