Hello. My friend and I are taking part in a science fair. We live in Zimbabwe and would like some assistance. We are trying to find a way to boost the rate at which many trees grow. We are thinking about genetically modifying some auxin or something, but we don't know which tree species we can use as a source of the desirable characteristic. If there is anyone who knows a fast-growing tree I can find in Zimbabwe that we can use to carry out our investigation, please lend a helping hand. It would be greatly appreciated.