This next Big Debate on Carbon Triggers has been indeed triggering. His big argument is that we have externalised the damage that comes from carbon and have done so for centuries. At the Carbon Triggers Big Debate, we have an opportunity to get serious about how to reduce our carbon consumption in buildings. Yet so many people say a budget or limit on carbon is a step too far. Will it stave off the damage until we figure out a new technology to embed carbon in rocks?