Write an article based on this summary:

Be sure to have proper ventilation. Open the oven the make sure there is nothing inside. If the oven is digital, press broil or bake on the keypad, and set the temperature. When the oven reaches the right temperature, place the food inside. Use caution if you smell gas.
Gas ovens are fueled by gas and thus emit more fumes than electric ones. Provide proper ventilation, such as keeping a window open. If you store baking tins inside your oven, you will need to pull them out and set them aside. Use the up and down arrows on the pad to adjust the temperature. Once you have set the temperature, hit "Start." The numbers on the screen will change—this is the current temperature inside the oven. Wait as the temperature rises and reaches the original temperature you set. Gas ovens heat up much faster than electric ones, so your oven should reach the proper temperature in 5 to 10 minutes.  Keep the oven door closed, unless the recipe states otherwise. Do not open the oven door and peek at your food, as this will cause the heat inside the oven to escape and prolong baking times. If you have a lot of baking to do and are planning on both racks, do not put too many dishes on the bottom rack. This may prevent the heat from reaching the food on the upper rack. If you smell gas while baking, you may have a gas leak. Turn the oven off immediately. Do NOT use any electrical appliances. Doing so may cause an explosion. Open a window and evacuate the house. Contact emergency services using either a neighbor's phone or a cell phone. Do not use your cellphone inside the house.