The European Union had approved a number of genetically modified crops until late 1998. But grow public 62. ______ concern over their supposed environmental and health risks led several EU country to demand a moratorium (暂时禁止) 63. ______ on imports of any new GM produce (转基因农产品). For late 1999 there were enough such countries to block any 64. ______ new approvals of GM produce. Last year, America filed a complaint at the WTO about the moratorium, without arguing that 65. ______ it was an illegal trade barrier because there is no scientific base for it. As more studies have been completed on the 66. ______ effects of GM crops, the greens’ case for them has weakened. 67. ______ Much evidence has emerged of health risks from eating them. 68. ______ And, overall, the studies have shown that the environmental effects on modified crops are not always as serious as the 69. ______ greens claim. Nevertheless, environmentalists continue to find fault of such studies and argue that they are inconclusive. 70. ______ While Americans seem happy enough to consume food made from GM crops, opinion polls continue to show that European consumers dislike the idea. Europeans seem be taking 71. ______ the attitude which , since there remains the slightest possibility of adverse consequences and since it is clear how they, as consumers, benefit from GM crops, they would rather not run the risk.