A new worldwide database charting the levels of 43 greenhouse gases over 2,000 years provides the clearest evidence yet that global warming is being caused by human activity.
Scientists from the Australian-German Climate and Energy College at the University of Melbourne, have created the database by collating historical and contemporary information on greenhouse gas levels, including from samples of air trapped in bubbles in ice cores at the North and South Poles.
The samples show a marked rise in the levels of carbon dioxide, methane, nitrous oxide and other greenhouse gases since the Industrial Revolution, and particularly since 1950.
Read more: Greenhouse gases higher than any time in 800,000 years ‘shows definite human effect’ by Claire Slattery on ABC News
Full study: Historical greenhouse gas concentrations for climate modelling (CMIP6) in the Geoscientific Model Development journal
