Growing up in a village in Burkina Faso, Georges Bazongo remembers his parents and neighbors cutting down trees each year to expand their farmland so they could ¡°grow enough food for our families to eat.¡±

He also noticed some trees becoming drier in the drought-prone region, an indication too that the soil was deteriorating as heavy rains washed away its fertile layer.

Some of his relatives moved to Cote d¡¯Ivoire in search of a better life, said Bazongo, 48.