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Bloodhound: supersonic car

Roland Dennison explains the design and testing behind the British engineered vehicle aiming to set a new world land speed record

Get talking - Geoengineering and HS2

Would HS2 gain more supporters if it could be seen to be groundbreaking in some technological way that might spin off elsewhere? Geoff Snape thinks so
Traffic jam on the M25

Actions of consequence

Fred discusses diesel cars and their unintended consequences