You are given a sentence in Galician. Your job is to translate the Galician sentence into English.

Por volta de 2030, se as variedades de millo, que é o cultivo dominante, — a metade de [inintelixible] en África dos Sur aínda está no campo — en 2030 — dicía — veremos unha diminución do 30 por centro na produción de millo por causa do cambio climático xa nesa data.
By 2030, if the maize, or corn, varieties, which is the dominant crop — 50 percent of the nutrition in Southern Africa are still in the field — in 2030, we'll have a 30 percent decrease in production of maize because of the climate change already in 2030.