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- Global Carbon Emissions Set to Hit Alarming 400 Parts Per Million Milestone Tue, 30 Apr 13, 10:10pmPhoto via Shutterstock For the first time in up to five million years, the concentration of carbon dioxide in our atmosphere is about to reach 400 parts per million (ppm)...
- Global Carbon Emissions Set to Hit Frightening 400ppm Milestone Tue, 30 Apr 13, 10:10pmPhoto via Shutterstock For the first time in up to five million years, the concentration of carbon dioxide in our atmosphere is about to reach 400 parts per million (ppm)...