What is the amount of CO2 added to the earth's atmosphere each year from fossil fuels?

Do you want the net increase per year (which has been measured for about a century) or the amount actually added by fossil fuel combustion? Not all of the CO2 added remains in the atmosphere.

You will find information on both at
http://en.wikipedia.org/wiki/Carbon_dioxide

The amount actually in the atmosphere increases by about 2 ppm per year, which is about about 0.5% . CO2 is currently 388 parts per million (ppm). The total amount in the atmosphere increases by about 1.6*10^13 kg per year. The amount added by human activty is estimated to be 2.7*10^13 kg/year. Some of that gets stored in the ocean.

To determine the amount of CO2 added to the Earth's atmosphere each year from fossil fuels, we can use data on global carbon dioxide emissions from fossil fuel combustion.

1. Start by finding reliable sources of data on global carbon dioxide emissions from fossil fuels. The International Energy Agency (IEA), the U.S. Environmental Protection Agency (EPA), and the Global Carbon Project are reputable sources that provide annual reports on carbon dioxide emissions.

2. Access the latest available data on global carbon dioxide emissions from fossil fuels. It's crucial to use the most recent data as emission levels may change over time.

3. Look for statistics that specifically describe the global carbon dioxide emissions from burning fossil fuels. These figures will typically be reported in metric tons or gigatons (1 gigaton = 1 billion metric tons) of CO2 emitted per year.

4. Consult the data and calculate the total amount of CO2 added to the Earth's atmosphere each year from fossil fuels. This can be achieved by summing up the reported global emissions figures for a particular year.

Keep in mind that precise figures can vary from year to year due to factors like changes in energy consumption patterns, advancements in renewable energy usage, and global economic conditions. Nonetheless, by following these steps, you should be able to find an estimate of the amount of CO2 added to the Earth's atmosphere each year from fossil fuels.