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1·The amount of carbon dioxide released by human activities such as burning coal and oil is small in comparison.

相比之下人类燃烧煤、石油等活动所释放的二氧化碳的量是少的。《柯林斯英汉双解大词典》

2·What belongs to nature cannot be the result of human activities and on the other hand, cultural development is achieved against nature.

属于自然的东西不可能是人类活动的结果，另一方面，文化的发展却是在违背自然的情况下实现的。

3·Human activities have serious effects on Earth.

人类活动对地球造成严重影响。

4·Now, with rising sea levels caused by human activities, it's sinking faster.

现在，由于人类活动导致海平面上升，它下沉得更快。

5·Their nesting sites are affected too, the same, by the same sorts of human activities.

它们的筑巢地点也受到同样的人类活动的影响。

6·We cannot rule out the possibility that climate change is not the result of human activities.

我们不能排除这一可能性，那就是气候变化不是人类活动导致的结果。

7·There are also several hypotheses that suggest some sort of human activities are partly responsible, like fishing.

也有一些假设表明人类的某些活动是部分原因，比如捕鱼。

8·At the same time, forests provide raw materials for human activities through their constantly renewed production of wood.

同时，森林通过不断更新木材数量为人类活动提供天然原料。

9·Also included will be any variations that have arisen from volcanic activity, solar activity, and, possibly, human activities.

这还将包括火山活动、太阳活动，可能还有人类活动引起的任何变化。

10·There is little doubt, however, that desertification in most areas results primarily from human activities rather than natural processes.

然而，几乎毫无疑问，大多数地区的沙漠化主要是由于人类活动而不是自然过程造成的。