Farming Method that Answers Climate Change.

• Position: FLOATING GARDENS

Bangladesh's floating gardens, built to grow food during flood seasons, could offer a sustainable solution for parts of the world prone to flooding because of climate change, a study published in the Journal of Agriculture, Food and Environment has found.

This type of garden began hundreds of years ago. They are made from native plants that float in the rivers--traditionally, water hyacinths--and operate almost like rafts, rising and falling with the waters. Historically, they were used to continue growing food during rainy seasons when rivers swelled with water.

The farmers layer the plants about three feet deep, creating a version of raised-bed gardens that float in the water. Then they plant vegetables inside those rafts. As the raft-plants decompose, they release nutrients, helping to feed the vegetable plants, which...