Because reducing emissions is good on its own.

- Using renewable energy in most applications is now several times cheaper than constantly importing coal, oil and gas. It's weird to suggest using renewables hurts a country economically.

- Not burning fossil fuels in your country improves air quality and correspondingly health outcomes.

- Not importing fossil fuels gives your country geopolitical security

- And when has the goodness of a deed ever been dependent on what others are doing.