BAGHDAD (AFP) - Radioactive wreckage and tens of millions of landmines still blight Iraq after decades of war and the deadly violence that engulfed the nation after the 2003 invasion, the Iraqi Environment Minister has said. Narmin Othman Hasan told AFP in an interview that a lack of funding and Iraqs fragile security situation is hampering efforts to clean up contaminated sites across the country. She said only a fraction of tanks and other wartime vehicles contaminated with depleted uranium have been successfully treated and disposed of by the Iraqi authorities. We have only found 80 per cent (of the contaminated sites)... because of the (lack of) security there are still some areas we cant reach, Hasan estimated. The twin menaces are the legacy of decades of conflict: the 1980-1988 war with neighbouring Iran, the 1991 Gulf war that followed Iraqs invasion of Kuwait and the 2003 US-led invasion of Iraq and its bloody aftermath. The Environment Ministrys limited budget - around $100 million compared to the billions that are judged necessary to tackle the countrys myriad environmental challenges - also gets in the way, Hasan said. Depleted uranium, a radioactive metal present in armour piercing bullets used by US-led forces during the 1991 Gulf War and the 2003 invasion, and which is twice as dense as lead, has been blamed for health problems from cancer to birth defects, but much research remains inconclusive. All radiation is dangerous - but how much depleted uranium radiation is affecting health, that is still under study, Hasan said, adding that media reports of negative health effects from depleted uranium had contributed to a panic among the Iraqi public. Its two steps: treating and dumping. We cant just bring a tank and dump it, we must treat it and minimise it. It takes time, she said in the interview on Thursday. But dealing with the landmines that continue to maim and kill innocent Iraqis is her most pressing concern, she said. For one person we have one mine planted. We have 25 million mines in Iraq - one quarter of the worlds mines. The United Nations has said the Iraqi armys decision to ban civilian-led mine-clearance operations is seriously damaging Baghdads pledge to rid itself of the deadly munitions. No one actor can accomplish this vast task of de-mining Iraq by itself - even one as powerful as the military, Andrew Gilmour, the UNs Deputy Special Representative of the Secretary-General to Iraq, said last month. Hasan also said that Iraqs water supply crisis is continuing, as a result of restricted flows originating from Turkey, the source of the Euphrates and Tigris rivers, as well as from tributaries in Iran. Turkey and Iran in my opinion are the big problem, she said. They know the situation in Iraq and how much of a problem there is, because the marshlands in Iraq are fed by the Euphrates and the Tigris. Menahile, Iraq has halted the dismantling of blast-proof concrete security walls in Baghdad following devastating truck bombings last week that left 95 people dead, government officials said on Sunday. The decision to stop dismantling the so-called T-walls was taken shortly after the attacks, high-ranking officials from the defence and interior ministries said on condition of anonymity. The sources did not say whether some of the barriers that have already been taken down would be re-erected in the wake of Wednesdays attacks, the deadliest since US forces pulled out of urban centres at the end of June. The walls are T-shaped concrete barriers about three metres high and linked with heavy-duty metal cables to protect against explosives. On Sunday, Foreign Ministry staff were seen erecting a new line of T-walls and the nearby streets remained closed to traffic. We will re-examine our strategy on security matters, Baghdad governor Salah Abdul Razzaq told AFP during a visit near the ministry. It is possible we will close certain places to ensure security, he said, adding that the bombers had exploited the Iraqi peoples desire to see the concrete barriers removed, ultimately making it easier to conduct the attacks.