 
 <prompt> Wetin fit be di possible temperature of di atmosphere? Based on di previous question, write a context wey contain 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. By middle Cretaceous, ocean waters for equator fit don too warm for sea life, and land areas wey dey near equator fit don be desert despite say water dey near. Oxygen circulation for deep ocean fit don get wahala. Because of this, plenty organic matter wey no fit decompose gather, and later dem deposit am as "black shale". 