The International Energy Agency says that renewable generation will become the biggest source of electricity by 2025.

This will indicate important progress, but it is not actually a crucial target. Our survival target is to reduce greenhouse gas emissions to a point lower than the rate at which they disappear from the atmosphere. That entails eliminating most fossil fuels from land, sea and air transportation, and greenhouse gas emissions from deforestation, agriculture, and construction.

The half-measures, such as nuclear power, carbon capture and storage, and "blue hydrogen" are not useful for this; they are at best distractions.

Once we reach the survival target, it would be wise to go further and reduce the levels of greenhouse gases in the atmosphere. Planting trees could do that, provided the trees survive and thrive. However, given plentiful renewable electricity, using that to capture carbon dioxide and convert it into durable goods could be worth doing.