What effects does using fossil fuels have on our planet

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

What are the north and south poles of a solenoid change with?