Forever I think. Global population is projected to peak at about 10 billion and technology is getting more efficient all the time. The planet receives vastly

Forever I think. Global population is projected to peak at about 10 billion and technology is getting more efficient all the time. The planet receives vastly more energy than we need even if everyone on the planet has a European standard of living. Everything we make can be recycled even with the technology we already have so long as we can expend enough energy. If our species dies out it will not be for want of stuff but because we are unwilling to work together.