We are past the point where stopping burning fossil fuels or planting trees is sufficient to meet the Paris goal of 1.5 degrees of warming. The IPCC scenarios now include some degree of geoengineering in the form of carbon sequestration: https://www.ipcc.ch/site/assets/uploads/sites/2/2019/09/SR15...

This technology is unproven- should it fail to be developed and scale then a sunshade might be on the table.