<section><h2>Topic 3f quiz</h2><p><p><span style="color: rgb(58, 52, 58);">This quiz will go back over the ideas in Topic 3f - GHG monitoring and identifying sources</span></p></p></section><section><h2>What are examples of natural sources of CO2?</h2></section><section><h3>Which policy helped to shift focus towards monitoring CO2 emissions?</h3></section><section></section><section></section>