A study published in Nature on Thursday reports that a rise in atmospheric CO2 56 million years ago caused widespread forest dieback, and the authors draw a direct line to today's climate change. The paper, titled 'Ancient rise in CO2 was catastrophic for forests: what that means for today’s plants,' lands as the crypto industry faces renewed scrutiny over its energy footprint.
What the study found
The research, based on analysis of fossil records and sediment cores, shows that the Paleocene-Eocene Thermal Maximum, a period of rapid warming, saw forests collapse across large swaths of the planet. The authors argue that the rate of CO2 increase then mirrors what's happening now, and that modern forests may be similarly vulnerable.
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Why crypto is in the crosshairs
The timing is awkward for the crypto industry. Bitcoin and other proof-of-work networks have long been criticized for their electricity consumption, and this study gives environmental advocates a fresh scientific hook. The paper's focus on forest dieback also ties into the broader carbon cycle, which could complicate efforts by miners to claim carbon neutrality through offsets.
The carbon credit angle
The study's focus on forests has a direct, overlooked link to carbon markets. Forests are major carbon sinks; their dieback reduces sequestration capacity, which could tighten supply in voluntary carbon markets and push up prices for offsets. That would hit miners who buy offsets to burnish their green credentials, while potentially boosting projects that generate carbon credits from reforestation.
What to watch
The publication comes months before the UN Climate Change Conference, where carbon border adjustments and emissions reporting for energy-intensive industries are likely to be on the agenda. For crypto, the key metric to watch is the ETH/BTC ratio. If institutional money starts rotating toward proof-of-stake networks like Ethereum, which are seen as more environmentally friendly, that ratio could climb even in a bearish market. That would be a signal that the ESG narrative is moving capital within crypto, not just out of it.
The study is already being cited in policy discussions, and the next test will be whether it influences the agenda at COP31. For now, the direct price impact on Bitcoin is likely muted, but the narrative shift could be slow and steady.
