严重旱灾已经减少了水域面积。
大约500万公顷的越冬农作物被估计受到严重危害，而春季农作物的播种面积被大幅减少。
Some five million hectares of winter crops are estimated to have been lost or damaged, and the areas planted in spring crops have been reduced substantially.
与干旱最严重时相比，目前广西因灾造成饮水困难人数下降到171.81万人，减少49.5%，农作物受旱面积下降到364.83万亩，减少77.4%。
Population lacking drinking water in Guangxi has declined to 1.72m, a 49.5% fall from the worst time. Crops affected by the drought dropped 77.4% to 3.65m mu.
如果皮损面积和严重指数评分(PASI 75)在第12周减少75%以上研究者认为这药有效。
Researchers considered the drug effective if it caused a 75% reduction in the psoriasis area and severity index score (PASI 75) at week 12.
最近几十年以来，热带地区国家森林面积减少的情况也十分严重。
In recent decades, the situation of the reduction in forest area is relatively serious in the countries which in the tropical region.
然而，由于人类活动的影响和过度开发利用，40年间，这片热带草原已遭到严重破坏，面积和蕴藏量都大幅度减少。
This tropical grassland, however, has been severely destroyed due to the effects of human activities and excessive utilization, which has been rapidly dwindled over the past 40 years.
这个保护区的水域面积通常达到将近300平方千米，现在已经减少到只有44平凡千米。85%的面积严重干旱。
The protection zone, which normally reaches nearly 300 square kilometers, has declined to merely 44 square kilometers. 85% of it is in severe drought.
研究结果表明：耕地、居民点及工矿用地面积增加，水域面积减少，湿地生态环境受到严重破坏。
With the increase of arable land, residential and industrial area, and the decrease of water area, the environment of Yeyahu River has been damaged dramatically.
第二章论述了民国时期西南地区森林面积、森林覆盖率的变化，分析了造成森林资源大量减少的原因，并揭示出森林破坏带来的严重后果。
The second chapter discusses the changes of the forest area and forest coverage, analyzes the reason of the decrease of forest resources, and reveals the serious consequences by forest destruction.
不远的将来，人口过度密集，可居住与可耕作面积减少，天空与海洋严重污染，绿地与居住空间成为一种奢望。
In the near future, population is over-intensive and habitable and cultivable land become very limited. The sky and sea are seriously polluted. A square of green field or living space become a luxury.
不远的将来，人口过度密集，可居住与可耕作面积减少，天空与海洋严重污染，绿地与居住空间成为一种奢望。
In the near future, population is over-intensive and habitable and cultivable land become very limited. The sky and sea are seriously polluted. A square of green field or living space become a luxury.
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