What I Know Directions: Wnte the letter of the correct anser A greenhouse C. greenhouse gases E atmosphere B. global warming D. greenhouse effect F. lithosphere 1. It refers to the gradual rise in the earth's temperature because of human activities. 2. A glass building uned to grow plants. It keeps the plants warm and protects them from bad weather. 3. When too many greenhouse gases are released into the air, they trap the aun's heat and cause the earth to get warmer 4. It is a layer of air and other gases that surrounds the earth 5. Gases build up in the air around the earth, which causes the earth's temperature to nise, 1​