Outstanding blog Narsi! I really like the point that you bring up first. Algae provided biomass for the oil we use now pumped up from underground. it is doubtful dinosaurs had enough mass to do the job. Personally I want to use biodiesel from used cooking grease to power a backup generator for a plugin electric car conversion. but that won't work for many people. They will be stuck with oil, at increasingly higher prices or fuel farmed biodiesel or ethanol. Both oil and fuel farming destroy the planet. From global climate change and perpetual war. I like the plan to grow an oil rich algae strain in solar collectors. That way the competing strains can be kept to a minimum. By feeding organic fertilizer from a biodigestor that has been sterilized by a high temperature solar collector. and feeding in cO2 from fuel cell/microturbine conversion of biogas and cellulose, the high temperature of the fuel cell will also sterilize any contaminating algae strains or bacteria. Water can come from recondensed vapor from the system as well as from the biodigestor and solar sterilizer. that water will be sterile as well. Plenty of space for algae solar collectors exists on rooftops and over parking lots to provide enough biodiesel to eventually replace oil. As long as oil demand is reduced by a switch to serail plugin hybrids, that is drivetrains that are essentially electric cars with backup generators fueled by biodiesel from algae. i think the backup generation of choice ought to be solid oxide fuel cell/microturbines. But for now do it yourself car convertors like myself will have to get by with diesel generators. the good part about this is the diesel generators also run on biogas. Providing a way to get electricity from a home biogas digestor until those multi-fuel solid oxide fuel cell/microturbines can be obtained. They can operate on cellulose as well as biodiesel, biogas, or regular oil based fuel from the gas station. I will keep on reading your blog!! excellent.