As you can see, there are many ways society can approach the struggle to reduce carbon emissions, but there is no single solution. Many of the strategies mentioned are the realm of governments. And the ever-growing world population means that we'll have to work that much harder to reduce global emissions. But on an individual level, there are many things one can do to make a difference.
Use mass transit, walk, bike, or even roller skate to get around when possible.
Maintain your car in good working order—oil changed, tires properly inflated, engine tuned—to increase fuel efficiency.
Drive with your wallet in mind: Accelerate slowly, reduce idling time, and unload unnecessary items from the trunk.
Telecommute.
Fly less. Hold more meetings via teleconferencing.
Use green power when possible. Your utility company can advise you about options.
Recycle more.
Compost. It cuts methane production in landfills and reduces the energy needed to collect trash.
Caulk, weatherstrip, insulate, and replace old windows.
Tune up your furnace.
Get a home energy audit, and then make some of the recommended changes.
Tune down your water heater to 120°F.
Unplug appliances when not in use, or put them on a power strip and switch it off. Many appliances draw power even when "off."
Buy less and make more environment-friendly purchases. For example, look for more fuel-efficient cars and items with minimal or reusable/recyclable packaging.
Eat less meat. Meat production uses more energy and produces more carbon than vegetable, fruit, or grain production.
Save water by buying water-saving appliances and toilets and installing low-flow shower heads.
Swap incandescent bulbs with fluorescent.
Buy products with a U.S. EPA Energy Star label.
Cut hot water use by washing clothes in cold or warm water.
Run the dishwasher and washing machine only with full loads.