Carbon offsets

I have hope those who travel abroad for political reasons do take into consideration the massive amounts of carbon emissions and how this affects the environment. These sort of negotiations are important to the extent that they continue education, conversation and exposure about environmental issues. Will it go beyond the discussion and actually change policy? Will the government officials take note and change their travel itineraries? Such questions are difficult to know answers to, but I'm curious to see how things have changed, two years later... (since this was published two years ago).