If I recall correctly, analysis indicates that tree planting is at best a partial and temporary palliative. Furthermore, arguing over temperature increase misses an important point that is indisputable: as oceans absorb CO2 they become more acidic. This in turn adversely impacts phytoplankton. As we rely on phytoplankton to supply 67% of the Earth's oxygen, it's not very clever to pursue policies that threaten their existence. Unless Trump and other mindless populists come up with spurious "evidence" that acidic oceans are in fact wonderful places for such delicate creatures to live, we can't help but conclude it is grossly irresponsible to keep pumping billions of tons of CO2 into the atmosphere each year. Regardless of whether or not the climate is impacted.