Table 1.
CO2 emissions trend over the years.
| Year | CO2 (Parts per Million—PPM) | Growth (PPM) |
|---|---|---|
| 1960 | 315 | 0.71 |
| 1970 | 325 | 1.13 |
| 1980 | 340 | 1.70 |
| 1990 | 350 | 1.16 |
| 2000 | 370 | 1.23 |
| 2010 | 390 | 2.43 |
| 2019 | 410 | 2.60 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.