Fires, and Debates, are Raging
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There are fires raging over much of Australia right now, triggering debate on the contribution of climate change to our current unseasonable weather. This has also led to well-meaning people reposting articles from the climate denial industry. I thought I'd record a summary of my responses for posterity. That the earth is getting warmer is a fact.* See the graph here . There are two main possible reasons the earth is getting warmer. 1) more sunlight is coming in or 2) more heat is being trapped. Option One isn’t true – solar activity has been carefully measured. See graph here . ** This leaves us with Option Two. The earth is getting warmer because more heat is being trapped in the atmosphere. But why is it so? There are several so-called greenhouse gases in the atmosphere that can trap heat (this is called ‘forcing’). Carbon dioxide, water, methane, and CFCs are among the known greenhouse gases . Of these, carbon dioxide has the biggest im...