And as population grows, livestock production intensifies, which has its own set of risk factors.

随着人口的增加，牲畜量也在增加，而这其中有着内在的风险因。

Sensitive to changes in weather conditions, altitude and temperature, coffee production has dropped significantly in the recent years.

因受气候变化、海拔和气温等因的影响，咖啡的量近些年来急剧下降。

If limited supply is the main driver, the adjustment will depend on how quickly companies can boost production.

如果限制应是主要驱动因，那么对此进行调整，这将取决于企业提高量的度。

A big driver has been increases in crop yields.

一个重要的推动因是农量的增加。

It also doesn't account for things like how much a country produces, unemployment levels or international trade.

它还没有考虑到一个国家的生量、失业率或国际贸易等因。

These factors led to a 3% global decline in car sales and production fell by 2.4% in 2018.

这些因导致 2018 年全球汽车销量下降 3%， 量下降 2. 4%。

A fourth factor was the two-way link between the rise in human population density and the rise in food production.

第四个因是人口密度的增加和粮食量的增加之间的双向联系。

The crops can also be affected by climate, disease and even political turmoil in the countries where the plants are grown, which further limits commercial production.

而种植罂粟受到气候、疾病，甚至政治动乱的影响，这些因都会进一步限制其工业量。