carbon dioxide

Rebuilding forests is a cost-effective way to cut carbon

Hydropower generates more CO2 than it saves

Study shows we've got photosynthesis wrong

Earth may be less sensitive to CO2 than our worst fears

Carbon emissions back on the rise

Study: Huge sugarcane expansion could send CO2 emissions south

Martian melt

Rapid, drastic warming pinned on small increases in carbon dioxide

A Swiss-cheese Martian landscape

Global stocktake shows the 43 greenhouse gases driving global warming

Global greening may be a double-edged sword

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