Whether or not it is worth trying to sway the most staunch climate deniers is a complex question with no easy answer. Some people believe that it is important to engage with climate deniers and try to change their minds, while others believe that it is a waste of time and effort. There are pros and cons to both arguments.

Pros:

* Engaging with climate deniers can help to raise awareness of the issue of climate change and the scientific evidence that supports it.

* It can also help to counter the misinformation that climate deniers often spread.

* By engaging with climate deniers, you may be able to change their minds or at least get them to think critically about their beliefs.

Cons:

* Engaging with climate deniers can be frustrating and time-consuming.

* You may not be successful in changing their minds.

* Some climate deniers may become hostile or aggressive if you challenge their beliefs.

Ultimately, the decision of whether or not to engage with climate deniers is a personal one. There is no right or wrong answer. If you are interested in engaging with climate deniers, there are a few things you can do to make the most of your efforts:

* Be respectful. Even if you disagree with someone, it is important to be respectful of their beliefs.

* Be patient. It can take time to change someone's mind.

* Be prepared. Be prepared to answer questions about climate change and the scientific evidence that supports it.

* Be positive. Try to focus on the positive aspects of climate change, such as the potential for clean energy and economic development.

By following these tips, you can increase your chances of having a productive conversation with a climate denier.