Carbon trading in commercial aviation

After nearly four billion years of Earth's evolution, the hurnan species stands bewildered by its own spectacular achievements and their efïects on atmospheric
composition. The world is getting warmer, prirnarily due to the continuing proliferation of carbon dioxide emitted through human activity and industry. From a trading perspective, th e operative question is whether we have the right to alter the composition of the global atmosphere if we are not in a position to definitively assess in advance the consequences?