Brazil climate pledge questioned after ethanol snub

By Marcelo Teixeira SAO PAULO (Reuters) - Biofuel and climate experts have questioned Brazil's commitment to a plan to cut carbon emissions by raising ethanol use after the country's government this week said it planned to scrap a tax break on the biofuel. Brazil pledged under the 2015 Paris Climate Accord to increase cane-based ethanol and biodiesel in its energy mix to nearly 18 percent by 2030. It was one of the marquee components of Brazil's proposed contributions to the agreement to wean th