Air travel generates significant amounts of carbon dioxide and other greenhouse gasses--about (1/4 pound/passenger-mile). We invite you to offset that load with a voluntary contribution, which ABAI will send to the organization CO¬2OL EFFECT. This organization plants trees for long-term benefits and funds other projects such as efficient stoves for developing countries whose impact is immediate. How much should you contribute for your ABAI trip? Multiply your flight time (one-way, just search “Flight time from ** to **”) to the conference by $1.50/hr, and that will give the suggested contribution for your round-trip travel. From CHI to DC, it would be about $3, and from LA to DC about $10. It’s not a lot, but will add up. Even a dollar will help.