I think your decision to quit your job in this bad economy is rushed and not carefully thought out. You should reconsider.
 Rushed not well thought out etc.白話的翻出即可.
這是一個連環問題: 燃燒石油導致二氧化碳增加，二氧化碳增加導致溫室效應，溫室效應導致冰層融化、海平面上升。 (請填空)
This is a chain of problems. Burning oil leads to increase in carbon dioxide, which leads to the greenhouse effect, which leads to elting of glaciers, which leads to rising sea levels.