 
 <prompt> How many square miles of the Alps wey glaciers cover for di year wey dey come two years afta 1874? Given di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: High levels of rain dey make glaciers for some areas go down reach permafrost levels while for other dry areas, glaciers dey stay above 3,500 m (11,483 ft) level. The 1,817 square kilometres (702 sq mi) of the Alps wey glaciers cover for 1876 don reduce reach 1,342 km2 (518 sq mi) for 1973, wey cause river run-off levels to reduce. Forty percent of the glaciation for Austria don disappear since 1850, and 30% of am for Switzerland don disappear. 