Currently, businesses and governments can damage the environment with impunity. We can protest, we can petition and we can lobby, but ultimately nothing happens. Even if we vote out the current leadership the system stays the same. With a general strike, we hit the system where it hurts; the ability to make money. A company is nothing without its workers; If enough of us collectively decide to stop working, we can bring the whole system to a halt.
We can also use a general strike as an opportunity to try something new, to build new communities and new ways of being. To win the strike workers will need to find new ways to support each other, and that solidarity will last long after the strike has ended.