Re: "Companies not responding to our pressure!" - ocean fertilization
One technique that was proposed to reduce the CO2 in the atmosphere - adding iron to the areas in the ocean where it is the limiting nutrient - was squelched by a number of the climate change groups who were horrified that a simple technological fix could remove their importance and salaries.
(Crudely each atom of iron can remove over 1000 molecules of CO2 from the atmosphere when it is added to an area of the ocean which is deficient in iron but has the other required nutrients.)