comma or period before adverb: at rock bottom prices. Often without


Senior Member
England, English
This is the summary paragraph for an article on a land-rush in Etheopia.

Rich soil, a tropical climate, and an abundance of water: the Gambella region, in the western part of the country, is fertile. Foreign investors lease thousands of hectares here for intensive agriculture, at rock bottom prices. Often withough worrying about the environment or the local population.

The question I have is with the last full stop. It seems to be that this should be a comma because it's directly related to the preceding sentence. Is this right?

Many thanks,
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