Why is nuclear not green?

Why is nuclear not green? The construction of a nuclear plant is a long and complex process that obviously releases CO2, as does the demolition of decommissioned nuclear sites. Uranium extraction, transport and processing is obviously not free of greenhouse gas emissions either.

The construction of a nuclear plant is a long and complex process that obviously releases CO2, as does the demolition of decommissioned nuclear sites. Uranium extraction, transport and processing is obviously not free of greenhouse gas emissions either.