Aside from being responsible for organisms within the ocean, coral reefs protect coastlines from the damaging effects of wave action and tropical storms. Without these animals our world would be a lot more destructive and a lot less rich with life. Changes in human behavior are essential to help save the reefs that so many of us depend on. Overall the main threat is the abundance of carbon dioxide being released into the atmosphere through human activity. Decreased carbon dioxide emissions can occur by switching to green and environmental friendly sources for transportation such as biking or carpooling. Even taking a bicycle to work or school a few times a month will have a positive effect on our oceans. Other ways to reduce emissions include turning off lights when you're not using them or switching to LED. Eating locally-produced and organic food can also cut carbon dioxide emissions by reducing the amount of greenhouse gases needed to transport food. Reuse and recycle materials as about 29% of greenhouse gases are released from manufacturing and transporting goods. Practicing these activities can also encourage others to do the same thing and will help limit the amount of CO2 being emitted into our atmosphere and our oceans.