Please choose the correct answer to the question: As the population in an area grows, water usage increases. Eventually, water usage can outstrip the supply. Which measure to increase the amount of available water demonstrates the best stewardship of the resource?

Answer1: discovering new reservoirs of water in the aquifer Answer2: reducing water usage through conservation measures Answer3: combining hydrogen with oxygen to make water Answer4: piping in water from an aquifer elsewhere

Answer format: answer1/answer2/answer3/answer4