The European Union had approved a number of genetically
modified crops until late 1998. But growing public concern
over its supposed environmental and health risks led several 1.
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 of GM produce. 2.
Last year, America filed a complaint at the WTO about the
moratorium, arguing that it was an illegal trade barrier
because there is no scientific base for it. 3.