Why have some international environmental treaties and conventions been effective while most have not?

Some international environmental treaties and conventions have been effective due to strong commitment and cooperation among participating countries, alongside mechanisms for monitoring and enforcement that ensure compliance. Successful treaties often address specific, measurable goals and facilitate financial or technical support for developing nations. In contrast, many treaties fail due to lack of political will, insufficient funding, vague objectives, or the absence of binding enforcement mechanisms, leading to non-compliance and ineffective implementation. Additionally, competing national interests and economic priorities can hinder collective action on global environmental issues.