Our research, based on an international dataset, shows that when CEOs form strong alliances within their company, it tends to have a negative impact on how well the company deals with carbon emissions. This happens because the loyalty within these alliances often leads other executives in the company to follow the CEO's lead, making it harder for the company to make long-term investments that would improve its carbon performance. However, we found that in certain situations, like in developed countries or those with good governance, this negative impact is lessened. Also, companies with more diverse boards or led by older CEOs seem to be affected less negatively.