There are many possible reasons for this. Among them are:
- Political reasons. Among many American conservatives, for example, it is widely believed that going green is something that only liberals do. To not go green can be something of a statement of one's conserative beliefs.
- Apathy. Many people simply do not care enough to go green. To such people, the costs of going green in terms of extra effort or changes to their way of life are too high. They are not motivated and so do not want to bear these costs.
- Lack of belief. This is related to the previous reason. Many people believe that there is no need to go green. This is particularly true of the idea that we need to reduce emissions in order to prevent global warming. People who do not believe that human action leads to climate change will not see any reason to go green.