California and Europe are pumping millions into development of electricity-generating roads using piezoelectrics. Piezos will also be useful in self-powered Internet of Things nodes because no one will change or even charge millions of batteries for those nodes let alone the envisaged billions. Without self-powered nodes, the IoT will be nothing more than a footnote in history. The new IDTechEx Research report, "Piezoelectric Harvesting and Sensing 2019-2039" is the first to pull it all together. Milliwatts or megawatts: where will piezoelectric success lie?

Diesel generator sets remain crucial to many key industries and are a multi-billion dollar global market.