Jeffrey Frankel: Technology won’t fix climate change. Only a carbon tax will

Innovation will play its part, but the answer is to raise the price of emitting carbon dioxide and greenhouse gases, says Jeffrey Frankel

ALTHOUGH many supporters of US president, Donald Trump, believe that global warming is a hoax, almost everyone else agrees that climate change should be the most pressing policy issue. Identifying the problem, however, is not much use, unless we also have the tools to address it.