I don't understand what you mean. What consumption shall we reduce? Less oil? Working on it (see: solar). Less food? Working on it (see: /r/progresspics, and all the science and journalism on this, soda bans, etc). Less cars? Working on it (see: Waze, Uber, Lyft, public transit, et al). Do you suggest that China didn't try population control at scale for generations? (1)
What, exactly, do you mean?
(1) https://www.washingtonpost.com/world/asia_pacific/china-lift...