The war between Israel and Hamas has devastated the Palestinian economy and left nearly all of Gaza's population in poverty, with quality of life indicators such as health and education knocked back 70 years, the United Nations' development agency said on Tuesday.

Launching a study on the war's socioeconomic impacts, the UNDP's Chitose Noguchi said the economy of the Palestinian territories — the Gaza Strip and the Israeli-occupied West Bank — was now 35% smaller than it was at the start of Israel's invasion of Gaza a year ago.

By some measures the poverty level in Gaza was now approaching 100% as a result of the disruption, with unemployment now at 80%, Noguchi said.