Which of the following is a sustainable practice in which people build small gardens on rooftops or in vacant lots? precision agriculture

urban greenhouse

hydroponic farming

vertical farming

urban greenhouse

Explanation:

Urban Greenhouse started to gain popularity as more people pay attention to the danger of climate change. Without having to spend a lot of money, urban greenhouse will provide the people with these following benefits;

- It will help reduce the overall CO2 emission.

- It will improve people's general health and well being.

- People can choose to use the types of plants that can be consumed in their urban greenhouse.

- Other than food, people can also choose the type of plants that provide some medicinal purpose.

a. i. only is correct.