2018年1月1日，一项针对象牙贸易的新法律生效，中国许多商店被勒令关闭。
Many shops in China were ordered to shut down as a new law against ivory trade came into effect on January 1st, 2018.
上个月，不少关于食品安全的新法律法规开始生效。
Quite a few new laws and rules on food safety were put into use last month.
在那些环保法律已经生效的州，有大量的消费者响应了废旧电器的回收行动。
Consumer response to recycling has been enormous in states where the laws have taken effect.
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