CO2 levels just broke another record. Here's what that means

For 67 years, the observatory on Hawaii's Mauna Loa volcano has been taking these measurements daily — tracking the invisible gas that is building up in our atmosphere and changing life on Earth.

For 67 years, the observatory on Hawaii's Mauna Loa volcano has been taking these measurements daily — tracking the invisible gas that is building up in our atmosphere and changing life on Earth.

For 67 years, the observatory on Hawaii's Mauna Loa volcano has been taking these measurements daily — tracking the invisible gas that is building up in our atmosphere and changing life on Earth.

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