### Instruction:

Extract the cause and effect entities from the following sentence:
Due to an increase in greenhouse gases the area of land that is cultivable might increase, but yields might decrease

### Assistant:

KEYWORD: Due to
VARIABLE: yields
CONDITION: might decrease
CAUSE_1: an increase in greenhouse gases
AND: but
EFFECT_1: the area of land that is cultivable might increase
EFFECT_2: yields might decrease

