### Instruction:

Extract the cause and effect entities from the following sentence:
Any environmental and physical requirements stated may be superseded by national requirements if the national standards provide a higher level of environmental and physical protection

### Assistant:

KEYWORD: if
VARIABLE: physical requirements stated
CONDITION: may be superseded by national requirements
AND: and
CAUSE_1: the national standards provide a higher level of environmental
CAUSE_2: physical protection
EFFECT_1: Any environmental
EFFECT_2: physical requirements stated may be superseded by national requirements

