This is the 5066th most frequent Russian word.
мировых
"Global" or "worldwide."
In this sentence, 'мировых' is a genitive plural adjective that modifies 'рекордов', translating to 'world records'.
Мировых рекордов установлено множество за последние годы.
Many world records have been set in recent years.
Here, 'мировых' is a genitive plural adjective modifying 'проблем', meaning 'global problems'.
Решение мировых проблем требует совместных усилий.
Solving global problems requires joint efforts.
The word 'мировых' here is in the genitive plural form, used as an adjective modifying 'войн', meaning 'world wars'.