An alternative plural spelling of biogas, though less standard than 'biogases,' sometimes used in older or non-standard texts.
A variant plural formation of biogas using the older English convention of doubling the final consonant before adding -es, similar to 'gas/gasses' spelling variation.
English plurals can be tricky—both 'gases' and 'gasses' exist, so technically 'biogasses' could appear, but 'biogases' is the modern standard, showing how language conventions evolve!
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