Read the passage below and summarize it using one sentence. Type your response in the box at the bottom of the screen. Your response will be judged on the quality of your writing and on how well your response presents the key points in the passage.

Transport accounts for about a quarter of greenhouse-gas emissions, and road transport makes up more than 70% of that amount. Ethanol is a clean, high-performance renewable fuel that works in most of today’s cars and certain trucks. Its use boosts engine efficiency, helps reduce harmful emissions and pollutants and fights climate change. Ethanol will also drive the more efficient internal-combustion and hybrid engines that will make up a large percentage of the world’s vehicle fleet in the decades to come. It does not require investing in new infrastructure in order to deliver results.

The carbon dioxide released by a vehicle when ethanol is burned is offset by the carbon dioxide captured when the feedstock crops are grown to produce ethanol. This differs from gasoline and diesel, which are refined from petroleum extracted from the earth.