Final answer:
US environmental regulations often use a command-and-control approach, which enforces limits on emissions and requires anti-pollution equipment. European countries, including Great Britain, typically have stricter environmental standards than the US, potentially involving more severe limits and enforcement.
Step-by-step explanation:
Environmental regulations in both the United States and Great Britain are aimed at reducing pollution and accounting for the social costs associated with it. In the United States, the command-and-control approach to regulating pollution is prevalent, which involves setting specific limits on allowable quantities of pollution and requiring the installation of anti-pollution equipment. Firms face increased costs due to these requirements and must consider the social costs when deciding their production levels. However, many European countries, including Great Britain, have been recognized for having stricter environmental standards in certain industries when compared with US regulations. This entails not just penalties for excessive pollution, but often more rigorous limits on emissions and stricter enforcement of these standards.