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Politics : Politics of Energy -- Ignore unavailable to you. Want to Upgrade?

To: Hawkmoon who wrote (36058)	12/5/2012 12:46:55 AM
From: Wharf Rat	Read Replies (2) \| Respond to of 86356

"you're referring to terrestrial plants" Yup; mostly only some Californians, Chinese, and Japanese eat seaweed. most of those crops are NOT natural.. " Yup... we could go back to the Buffalo Commons, but a lot of us would starve. There are 7 billion of us precisely because we eat unnatural crops. en.wikipedia.org "whereas only nutrients and Iron are limiting factors to Phytoplankton" Also temperature and ocean pH. If we were baleen whales, you might be able to feed us, but... we aren't.

To: Hawkmoon who wrote (36058)	12/5/2012 12:52:28 AM
From: Maurice Winn	1 Recommendation Read Replies (1) \| Respond to of 86356

It's not quite that simple Hawk.<In sum, water (and nutrients) is a limiting factor to terrestrial plant growth, > Another limiting factor for terrestrial plants is CO2. If they are borderline on water, extra CO2 can make up the difference. With extra CO2, even in dry conditions, some plants can get a foothold where there would otherwise be desert. Very rarely [I can never recall the point being made] do we hear from climatologists and CO2 alarmists anything about the kilometres of marine sediment lying on the oceanic crust being trundled to the subduction zones. As you have carefully pointed out, those sediments include petatons of carbon from sinking stuff such as radiolarians which got their carbon from air. The oceans are vast and where there are nutrients, there is absorption of CO2 and sedimentation. Plants are not so fussy about their nutrient requires as humans, so they can get by with a boost in iron and not much else. Certainly in many areas they just need some iron. Mqurice