World leaders have tried and failed to curb climate change by appealing to nations to act for the common good. Now, the Iran war and its costly energy crunch have some experts wondering if selfishness and nationalism may be a more likely way to save the planet, by boosting support for homegrown renewables over imported fossil fuels. Bombed refineries , disrupted shipping channels for oil and liquefied natural gas and skyrocketing fuel prices should point even the most reluctant leaders to a