Write at least two problem statements on your own, use the format of How can we$.?$ and provide the rationale, respectively.

Here are some examples:

$1.$ How can we provide inexpensive shelters for homeless people under a variety of climate conditions?

$2.$ How can we provide a means for urban neighborhoods to raise their own food?

$3.$ How can I help a small village or town monitor its water source and provide treatment for impurities at minimal cost?

Rationale: $1.$ This is a serious problem even in developed countries. $2.$ Water contamination affects food production, contributes to disease. Hi$-$tech solutions are often too expensive to implement and too complex for local people to use$/$maintain$.$