One is easier on the lungs, one on the planet, and two use compounds from fireworks. Any one of these being tested by the US Army could replace the WWII-era smoke grenades still in use.
Daring to put a 1-liter engine in production, Ford shows that modern tech can get a lot of power out of only three cylinders.
Porsche brings us a plug-in hybrid that proves that you don't not need to sacrifice speed for efficiently all the time.
We popped along to the Gadget Show Live to see what shiny kit was on display at the UK's largest consumer technology show.
Apple's usually calm and collected CEO Tim Cook is reported to have reacted angrily to suggestions that Apple only act for profit in future.
BMW are joining the eco party with the i3, the first in their eco focused "i" sub-brand. XCAR take a look at how BMW see the future of electric cars.
Chinese phone firm ZTE is getting in the modular mobile action with this, the Eco-Mobius.
The Eco-Mobius is a concept design from ZTE that enables users to switch out hardware components of their smartphones.
The future of cell phones is made to order with the ZTE Eco-Mobius.
The Range Rover has been given a hybrid setup, so we took it off road to see whether water and electricity can safely mix.