Biofuels like ethanol might help fight climate change. But they can contribute to food insecurity and greenhouse gases in ways that might surprise you.

Can carbon offsets help you reduce your environmental footprint, practice sustainable living and fight climate change?

Radiocarbon dating is a method of radiometric dating. Learn how archaeologists use carbon isotopes to find the age of organic materials at archaeological sites.

Biofuels are a renewable energy resource that can often substitute for fossil fuels. Why are biofuels promising, and why aren’t we using more of them?