Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.

Q: Some of the animals weighed as much as 700 kg (1,500 lb) or possibly larger.

A: Some of the animals weighed more than 700 kg.
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Q: It grows to up to 20 m, although it is typically more stunted in its native environment.

A: It grows up to 20 m, but is usually shorter in its natural environment.
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Q: Economy The only economic activity of importance is agriculture.

A:
Agriculture is the only economic activity of importance.
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