  Global warming is a major environmental concern of our times. It has been
suggested that the planting of trees could constitute a way of mitigating the
adverse effects of the increasing anthropogenic carbon emissions. We developed
a simple data-driven model to predict the global average temperature in diverse
scenarios to better understand the outcome of human interventions. We find that
to remain under the 1.5 degree of anomaly set by the Paris agreement, the
fossil-fuel energy production needs to decrease to at least 10% of the
projected figure in 2050 combined with planting a trillion trees.
