麻烦造几个英语句子,请说明应该添加什么东西进去.要是有语法错误,请帮忙改正.

1.There is a general discussion today about the issue of whale hunting （名词）.And it has always been a controversial topic.
2.There is no consensus of opinions among people as to the role of chiemical fertilizer in crop growing （名词短语）.Some people claim that chemical fertilizer can help increase the output of crops （宾语从句）,while others believe that it imposes threat to people's lives when consuming too much grain with chemical fertilizer （宾语从句）.
3.We must look for all immedicate methods,because the present situation of pollution in water（名词短语）,if permitted to continue,will surely lead to disastrous consequence to the lives of the people living nearby （名词短语）.
4.To reverse the trend is not a light task ,and it requirs keen consciousness of a consideration of the potential consequence （名词短语）.
5.No easy method can be at hand to solve the problem of the severe drought suffered by the southwestern provinces （名词短语）,but the general awareness of the importance of a balanced nature （名词短语） might be the first step on the right way.