Engineering publications brought to you by Mark Allen

Energy & environment

Piezo device harvests energy from sound

New process simplifies recycling of plastics

The developing climate for change

Imports warning for UK gas production

The robot innovation challenge

Wales prepares for deployment of tidal energy device

Catalyst converts carbon dioxide into fuel

Boris Johnson proposes further levy on polluting motorists

Commemorating engineers' role in WW1

Stable lithium anode promises efficient rechargeable batteries

Your questions answered: geoengineering

Power games