G20 Leaders to focus on climate change at summit

At the United Nations, President Obama urges bold, swift, global action to address climate change.

CNN's Emily Chang reports on Chinese President Hu Jintao's speech before the U.N. on climate change.

How Big Is Your Eco-Footprint?

How Big Is Your Eco-Footprint? on Howcast

Each one of us leaves a measurable footprint on the planet. It’s called an eco-footprint and it’s the amount of energy and natural resources that the planet must provide to sustain our lifestyles.

-- you know they each one of us lead they measurable footprint on the planet. It's called an eagle footprint and it's the amount of energy and natural resources that the planet must generate to sustain our lifestyles. Do you have any idea what you're -- footprint and -- -- -- by using the eagle footprint calculator at doing your part dot com and truck. It's eye opening. You start with entering basic information about where you live how many people live with tubes and the size of your home. Asked about what forms of energy you used in your home -- like multi issues and how you save electricity. After you enter the number of miles traveled each year it's all about how you eat what she eat and where you shop for food. You'll be asked about water saving measures in your home products used to build your home in the chemicals you use to clean it. And last it's all about the trash how much do you generate every week and what items do you recycle on a regular basis. It calculates how many planets it takes to maintain your lifestyle and the results may shock you. It's not a perfect test but it just on making each one of us realize how much we take from the planet every day. In fact this year alone we'll take 40% more than the planet can naturally produce. That means we're dipping into the future just to keep up our lifestyles and fat is not sustainable. My hope is that you'll visit date your part dot com to measure your eco footprint and learn ways that you can start treading lightly on our planet. I reducing. Reusing and --

How To Reduce Your Carbon Footprint

Your carbon footprint is how many greenhouse gases you release in your daily activities. Be remembered by your good deeds, not your carbon emissions.

How To Reduce Your Carbon Footprint on Howcast

Step 1: Turn thermostat up/down
Turn your thermostat up in the summer or down in the winter by just two degrees, and you’ll prevent hundreds of pounds of carbon dioxide from being released each year.

Close doors to rooms that you are not using to maximize heating and air conditioning. Insulate windows and doors to save even more heating costs.

Step 2: Unplug electronics
Turn off and unplug your computer, TV, and other electronics when you’re not using them. Even electronics in sleep mode draw power.

Leaving your TV cable box on 24 hours a day uses about 65% as much energy as a standard refrigerator.

Step 3: Change bulbs
Change all the incandescent bulbs in your home to compact fluorescent bulbs, which use about 75% less energy.

Step 4: Do full loads of laundry/dishwashing
Do your laundry or run a dishwasher only when you have a full load. It saves water and it’s an excuse not to clean.

Step 5: Eat local
Eat local: An organic out-of-season vegetable from the other side of the world may sound delicious, but it had to make that trip on a huge container ship.

Take a canvas tote with you shopping, so you have a ready – and better – answer to the question “paper or plastic?”

Step 6: Bring own coffee cup/mug
Bring your own cup or mug when you buy coffee and stop tossing an average of 20 pounds of disposable cups a year.

Step 7: Cut back on bottled water
Cut back on bottled water. Most tap water is perfectly safe to drink, and making the plastic and transporting the bottles uses huge quantities of fossil fuels.

Step 8: Plant a tree
Plant a tree. Trees help reduce greenhouse gases, and every one counts. Consider it a peace offering to the Earth.

Step 9: Consolidate car trips
Don’t jump in your car every time you feel the urge to run an errand. Plan and consolidate your trips to cut down on gas.

Step 10: Carpool, public transportation, bike, or walk
When you can, carpool, use public transportation, or ride your bicycle. Or walk, proud to be treading lightly.

Cattle produce as much as 37% of the atmosphere’s methane, a greenhouse gas 20 times more potent than carbon dioxide.