Hat tip @ola who asked about carbon footprint offsetting. I looked into this and the Carbon Fund offer a simple offsetting option where we estimate our annual air miles, hotel nights, and other forms of travel, and they generate a total cost which we pay over annually. The Fund then invests that amount into carbon reduction projects globally.
Floating this here in case you have any thoughts on the idea itself, the choice of offsetting provider, or any other CSR type ideas.