1. Parents should teach their kids sanitary habits as they grow up.2. Parents should teach their kids good habits as they grow up.
teach somebody good habitsteach their kids good habits 就是讓孩子養成好習慣的意思，而 teach their kids sanitary habits 就是教孩子衛生習慣的意思
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 melting of glacirs, which leads to rising sea levels.