 
 <prompt> ```Why e fit dey hard to see fish? Based on di question wey dey before dis one, write one context wey get di answer. E fit be 1 - 20 sentences. Context:``` <response>: ```Di climate of di Cretaceous dey less certain and dey more widely disputed. Higher levels of carbon dioxide for di atmosphere dey make world temperature gradient from north to south almost flat: temperatures dey about di same across di planet. Average temperatures sef dey higher pass today by about 10°C. Infact, by di middle Cretaceous, equatorial ocean waters (perhaps as warm as 20 °C for di deep ocean) fit don dey too warm for sea life,[dubious – discuss][citation needed] and land areas wey dey near di equator fit don dey deserts despite their proximity to water. Di circulation of oxygen to di deep ocean fit don dey disrupted.[dubious – discuss] For dis reason, large volumes of organic matter wey no fit decompose fit don accumulate, eventually being deposited as "black shale".``` 