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There is no formal code of conduct that mountaineers are obliged to follow, but the International Climbing and Mountaineering Federation has an ethics declaration, which says climbers "engage in this activity at their own risk and are responsible for their own safety". However, it also notes that mountaineers "should be prepared to make compromises in order to balance the needs and abilities of all the group".
The full test is in our test suite.
Non-profit group the Environmental Defense Fund estimates that there will be an additional 7.5-18 billion tonnes of greenhouse gases - three times the amount emitted in a year at present - emitted by 2055.