Humans have increased atmospheric CO 2 concentration by more than a third since the Industrial Revolution began. This is the most important long-lived forcing of climate change. Methane.
Buy Forever stamps online directly from USPS. The current Forever stamp value is 49-cents - the current First-Class Mail one-ounce rate.
The traditional first-class stamp is being phased out and replaced with so-called forever stamps. The United States Postal Service is expected to announce on Jan. 14 that all first-class stamps for mailing standard envelopes will become forever stamps. Forever stamps remain sufficient for first-class postage no matter how much rates rise in the future. Currently, a first-class stamp for a standard-sized envelope weighing up to one ounce costs 44 cents, with no increase planned through at least 2011.