 
 <prompt> Wetin go dey odd to see? Based on di last question, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: The climate for Cretaceous dey less certain and dey cause argument. Dem believe say higher levels of carbon dioxide for atmosphere dey cause world temperature to be almost the same everywhere. Temperatures for that time dey about 10°C higher than now. For middle Cretaceous, water for equator fit don too hot for sea life, and land areas near equator fit don be desert even though water dey close. Oxygen circulation for deep ocean fit don get problem. Because of this, plenty organic matter wey no fit decompose gather, come finally settle down as "black shale". 