Quality / contamination of drinking or beach water, of indoor or outdoor air, of soil or food products, sustainable agriculture… environment and environmental health are big issues for microsensors, with an urgent need for high sensitivity, and most of all high selectivity. Surface Acoustic Wave devices, as well as radio-frequency and optical microsensors are presented as promising devices. Integrated with nano-structured sensitive advanced materials, they can address a large spectrum of applications. Together with recent topics on the development of flexible devices with friendly-printed technologies and wireless solutions for micro-energy, this leads us to perspectives in wireless sensing networks.