Think of all the pollutants made to mfg all that white paint.
Set up for algae conversion on a farm? I don't see a reason why it couldn't be done. Crop wise the algae grows fast and in more abudance per acre then corn. So thats the easy part, converting to diesel might be a snag but ethanol maybe not. Are you thinking of running your tractors and combines off it? If so I'd agree its a good idea until the factories start turning out decent electric tractors, industry always seems to go for the sports car first not the station wagon. You'd have to weigh in the costs of the operation itself, the loss of acreage & profit from crop too, and how much you'd need to build to operate the machinery aiming for heavier use needs and not averages before building any contraptions. But yeah I think it can be done.