Al-Jazeera Video: Gaza's water supply near collapse

"The Gaza Strip's underground water supply is in danger of collapse due to overuse and contamination, exacerbated by Israel's offensive in December.

Billions of dollars could be needed over the next 20 years to restore Gaza's aquifer. Meanwhile, Palestinians have taken the onus of re-developing their water system before matters get any worse

Al Jazeera's Casey Kauffman reports. "