ruled that the downstream emissions of fossil fuel extraction projects must be considered in the approvals process

Could anyone who knows more about this chime in to explain what we can expect out of this, considering real world politics?

• How likely is it that projects will be “properly considered” and then approved anyway?
• Do companies currently have to take responsibility in any capacity for the consequences of previously considered emissions?

Not trying to dismiss what’s good here, rather, I’m trying to understand what exactly it means.