Pitcher pure
Diamond clear
Safe drinking
Clean option
Now in Gujarat
Arsenic, 10-15 times above India's set standards
Handy copper cure
A non-governmental organisation uses the metal to purify water
Sun shining down
Yes. The Sun can save us from a water crisis
Towards a common goal
Water vigil
A third language area identified in the cortex
Clean-up act
Clean with coir
Biofilter for domestic wastewater
Instant data
A new device to measure wastewater pollution on-site
Toilet training
At Nacka nature school in Sweden
Dhaka
Still stressed