From the Wells Fargo's Archives, a check brochure from 1972:

If you're concerned about our environment, you know there are many ecology organizations who need and deserve support. It was this kind of concern that prompted what we call our Ecology Donation Program. The way it works could hardly be simpler.

Every time you purchase a supply of Wells Fargo checks during 1972, we'll give you the opportunity to have us contribute 25 cents out of the purchase price to an ecology group of your choice.

As the project managers understood, Wells Fargo's stagecoach checks and Western-themed checks would be popular. The 25-cent donations generated about $75,000 during the campaign, for worthwhile ecology organizations  in California, like the National Audubon Society  and The Nature Conservancy .

"It's another case," the brochure added, "where 'little things mean a lot.'"

Go Green!  Go Wells Fargo!

There is more about Wells Fargo's commitment to improving the environment here.