How much CO2 do humans produce? (Natural vs manmade carbon emissions)

'What Percent Of Our Atmosphere Is CO2?': Doug LaMalfa Stumps Entire Panel With Climate Questions

Are humans really behind the extra CO2 in the atmosphere?

How much CO2 have humans emitted?

Do volcanoes produce more CO2 than human activity? -- a look at Ian Plimer's claim.

CO2 Misconceptions: Debunking Doug LaMalfa on Climate Change

Climate Science in a Nutshell #4: Too Much Carbon Dioxide

誰が気候変動の責任者ですか？ –誰が修正する必要がありますか？

“Climate and Energy Policy,”: Dr. Timothy G. Nash, & Jason Hayes

CO2: How an essential greenhouse gas is heating up the planet

No, volcanoes do not emit more CO2 than human activity

Oxygen & CO2 Exchange: Learn@Visible Body

Are humans contributing only 3% of CO2 in the atmosphere?

The tricky plan to pull CO2 out of the air

Humans emit 100 times more CO2 than all volcanoes on Earth

How much CO2 do we really produce?

How to Count ALL Human Carbon Emissions in the US

This tool will help us get to zero emissions

The Carbon Cycle – Human Industrial CO2 a Small Part

How humans disrupted a cycle essential to all life