Why did the 400ppm carbon milestone cause barely a ripple? | Andrew Simms | Environment | guardian.co.uk.
- Scientists: Global CO2 levels expected to break 400 ppm within days (dgrnewsservice.org)
- We’re About to Pass a Disheartening New Climate Change Milestone (blogs.smithsonianmag.com)
- Global carbon dioxide levels set to pass 400ppm milestone (guardian.co.uk)
- Carbon Dioxide Passes 400 PPM Milestone, NOAA Finds (themoderatevoice.com)
- In ‘March Toward Disaster,’ World Hits 400 PPM Milestone (commondreams.org)