Weather Blog A Seaweed Economy Tied to the Tides Farming of this valuable product has become common in recent decades in the waters of Tanzania’s Pemba Island. Read More… About Author OTW Observer See author's posts Post navigation Previous London weather map shows exact day sweltering 40C heatwave will hitNext Southwest monsoon season: What you need to know Related Stories Farming in Ancient Lake Agassiz Weather Blog Farming in Ancient Lake Agassiz May 19, 2026 Great Balls of Fire Weather Blog Great Balls of Fire May 18, 2026 Picturing Earth in a New Light Weather Blog Picturing Earth in a New Light May 15, 2026