Fossil fuels are materials that are non-renewable such as oil, gas and coal. Aside from causing local air pollution from polluting particulates, the burning of fossil fuels releases carbon dioxide into the atmosphere, which is a greenhouse gas that contributes to climate change. Moreover, many fossil fuels are reaching their "peak" (oil being the most rapidly depleted). At some stage in the near future, switching from fossil fuel usage to renewable energy makes sense from economic, environmental, safety and health points of view. By starting your journey in conserving fossil fuels through changing your own uses, you can help others to see that a good and healthy life can still be had without guzzling away these precious resources.

Method 1 of 3: Around the House
Reduce your use of plastic
Reduce, reuse, recycle.
Be energy conscious with your power in the home.
Install solar panels.

Method 2 of 3: Transportation
Ride a bike or walk more.
Consider shifting to a hybrid or electric car.
Catch public transportation more often.
Reduce the amount of your flights.
Avoid being traffic.

Method 3 of 3: Be the Change You Wish to See in Others
Influence others in your local area and community. 
We should use cycle or other things that does not use fossil fuels