Another major concern is the environmental impact of transport, which accounts for roughly 25% of total carbon dioxide emissions.
2
总二氧化碳浓度自表层至底层和自陆架坡折区到近岸和外海由低变高。
The total carbon dioxide concentration increases from the surface layer to the bottom layer, and from the shelf break area to the near shore and to the outside sea.
3
仅在亚马逊的树木砍伐每年就会释放7亿吨的二氧化碳,几乎占到该国总排放的一半。
The cutting down of trees in the Amazon alone releases 700m tonnes of carbon dioxide into the air annually, fully half of the country's total emissions.