Carbon Dioxide Levels Are Highest in Human History - The New York Times

How the World Passed a Carbon Threshold and Why It Matters - Yale E360

None of This Was Inevitable

The U.S. Is the Biggest Carbon Polluter in History. It Just Walked

Climate Change: Atmospheric Carbon Dioxide

New York's energy-related CO2 footprint dropping - Investigative

Energy Policy – Page 6 – Coyote Gulch

Wildlife in the West: The good, the bad, the in-between

What Earth was like last time CO2 levels were as high as today

Highest CO2 levels in human history detected

Energy Policy – Page 6 – Coyote Gulch

It's gonna get hot: Atmospheric carbon dioxide over the past

Energy Policy – Page 6 – Coyote Gulch

How Does Carbon Capture Work? - The New York Times

What is climate change? A really simple guide - BBC News