moisture is a kind of environmental factor & warmth is a kind of environmental factor ->  warmth and moisture are kinds of environmental factors  warmth and moisture are kinds of environmental factors & warmth and moisture can accelerate chemical reactions ->  a warm and moist environment can accelerate chemical reactions  a warm and moist environment can accelerate chemical reactions & chemical weathering means chemical reaction causes the weathering of rocks -> a warm and moist environment can accelerate the rate of chemical weathering on rocks