Due to mining costs and environmental constraints, China needs to import more than 80% of the iron ore currently, mainly from Australia and Brazil.

由于开采成本和环境制约，中国所需的铁矿石目前80%以上需要进口，主要进口自澳大利亚和巴西。

youdao

In China, due to a variety of soft and hard environmental constraints, the effect of port logistics to modern integrated logistics is much less than developed countries.

在我国，由于受到各种软、硬环境的制约，港口物流在现代综合物流中所发挥的作用远不及发达国家。

youdao

The accumulation of garbage, shortcomings in transport and storage facilities due to budget constraints, the proliferation of environmental diseases and the presence of informal pig breeders led to an unbearable situation.

UNESCO: Background