Learn Swedish: Vi pratar ofta om att pensionen har fler fördelar än nackdelar. - We often talk about the fact that retirement has more advantages than disadvantages.

In Swedish, verbs that naturally take a preposition keep that preposition even when followed by an att-clause (a "that" clause). Because you say pratar om (talk about) a topic, you must keep the om when the topic is an entire clause. English often inserts "the fact" (talk about the fact that), but Swedish just puts the preposition and att side by side.

Why is it fler fördelar and not mer fördelar?

Fler is used for countable nouns (things you can count, like fördelar - advantages) to mean "more in number". Mer is used for uncountable nouns (like water, money, or time) to mean "more in amount". Since you can count advantages, you must use fler.

Does pensionen mean "retirement" or "the pension"?

It means both! In Swedish, the word pension is frequently used to refer to the phase of life (retirement) as well as the actual money you receive. While there is a specific word for the act of retiring (pensionering), everyday Swedish often just uses pensionen (the retirement/the pension).

Is fördelar än nackdelar related to "pros and cons"?