How do I tag a company email with a short environmentally friendly message?
I think the second line would have more oomph if it demonstrates that your company is actively committed to conservation, rather than just thinking it’s a nifty idea. Something like “[company] sources recycled materials whenever possible” or “[company] recycles X% of its waste” or whatever specific data you have that goes beyond just having one ream of recycled paper in the back of the supply closet. I’ve worked at companies where every desk has a recycle bin, but no one uses them; a company where environmentally sound practices are actively encouraged would impress me. If your company has several such factoids, maybe everyone could have a different one on their signature, or you could rotate every few weeks.
