[填空题]
The European Union had approved a number of
genetically
modified crops until late 1998. But growing
public concern over its supposed
environmental and health 62. ______
risks
led several EU countries to demand a moratorium(暂时
禁止) on imports of any new
GM produce. By late 1999
there were enough such country to block any new
approvals 63. ______
of GM produce. Last
year, America filed a complaint at file
WTO about the moratorium, arguing
that it was an illegal
trade barrier because there is no scientific base for
it. 64. ______
As more studies
have been completed on the effects of
GM crops, the greens’ case for them has
weakened. 65.
______
Much evidence has emerged of health risks from eating them.
66. ______
And, overall, the studies have shown that the
environmental
effects on modified crops are not always as serious as the
67. ______
greens
