Campus protests live updates: NYPD move into clear protests at NYU and The New School; more than 2,000 arrested nationwide nbcnews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from nbcnews.com Daily Mail and Mail on Sunday newspapers.
As aviation is responsible for significant CO2 emissions, the industry is striving to clean up its act. Here we look to the future with five electric planes.