I've noticed that one of the hotel programs has an option of donating points to offset CO2 emissions. An average hotel night collects 3000 points, and according to the calculations, 2000 points are needed to offset the stay-induced emission. So is this the next trend?

If airlines offer this redemption option, it can help create the "Green Mileage Run": First, you collect enough EQMs to get the elite status. Then, you donate enough award miles to offset the emission.