____1____ is an increase in the Earth’s temperature. One factor that causes it is our use of ____2____(oil, gas, and coal). When we burn these fuels, they release ____3____ like carbon dioxide into the air. In large amounts, these gases trap heat and cause Earth to get warmer. This can lead to extreme weather and other dangerous environmental changes. The solution to this problem is for each person to reduce his or her ____4____.