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

随着人口增加，牲畜也在增加，而这其中有着内在风险因素。

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

因受气候变化、海拔和气温等因素影响，咖近些年来急剧下降。

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素，那么对此进行调整，这将取决于企业提高速度。

A big driver has been increases in crop yields.

一个重要推动因素是农作物增加。

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生、失业率或国际贸易等因素。

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

这些因素导致 2018 年全球汽车销下降 3%， 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.

第四个因素是人口密度增加和粮食增加之间双向联系。

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，甚至政治动乱影响，这些因素都会进一步限制其工业。