Before a person can approach the concept of global warming, they must first analyze the true definition of what it is. Climate change periodic modification of the Earth's climate resulting from changes in the atmosphere as well as interactions between the atmosphere and various other geological, chemical, biological, and geographic factors within the Earth system. (britannica) Since the world's 196 countries must share oxygen and carbon dioxide, we should all share in the responsibility of caring for the Earth. On November 6, 2012, President Obama said we want our children to live in a world free from the destructive power of a warming planet. The biggest challenge we face is not just avoiding global warming. Greenhouse gases have a significant impact on our atmosphere. These gases include water vapor, methane, ozone, nitrous oxide and carbon dioxide. Each greenhouse gas molecule has at least three atoms that are loosely bonded together and eventually release heat energy and this is absorbed by another greenhouse molecule. Many people talk about greenhouse gases like it's a bad idea, but it's not a bad thing. Without these gases, the Earth would be at zero degrees on the surface. However, too many greenhouse gases can cause temperatures in the atmosphere to rise, oceans to warm beyond what they would normally be, and weather to become unpredictable. The same is true with fossil fuels which produce various emissions that pollute our planet's air and water. These pollutants threaten the environment and its consequences. When we reduce greenhouse gases, we reduce the amount of carbon dioxide released into the atmosphere. By not burning fossil fuels like natural gas, coal, oil and gasoline, we reduce global warming. We can also reduce greenhouse gas emissions by using less heating and air conditioning. Some experts say that simply reducing heat by 2 degrees in winter and more in summer can save about 2,000 pounds of carbon dioxide each year. Additionally, by reducing, reusing and recycling half of household waste, we can save 2,400 pounds of carbon dioxide per year. There are things a person can do without even thinking about it that can contribute to the cause of climate change, such as replacing light bulbs, driving less, driving smart, buying energy efficient products, using less hot water , plant trees and encourage others to