Soak the glass jar in (a pot of) hot water to warm it up.
 soak something in hot water put something in hot water白話翻譯即可。
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 meting of glaciers, which leads to rising sea levels.