By David Keith
Weather engineering -- that can sluggish the speed of worldwide warming by way of injecting reflective debris into the higher surroundings -- has emerged in recent times as an exceptionally debatable know-how. And for sturdy cause: it incorporates unknown hazards and it may possibly undermine commitments to protecting strength. a few critics additionally view it as an immoral human breach of the flora and fauna. The latter objection, David Keith argues in <I>A Scientist's Case for weather Engineering</I>, is groundless; we've got been utilizing know-how to change the environment for years. yet he has the same opinion that there are huge matters at stake. a number one scientist lengthy fascinated with weather swap, Keith deals no naïve suggestion for a simple repair to what's maybe the main not easy query of our time; weather engineering is not any silver bullet. yet he argues that once many years within which little or no growth has been made in lowering carbon emissions we needs to placed this know-how at the desk and think about it responsibly. That doesn't suggest we are going to set up it, and it doesn't suggest that we will abandon efforts to minimize greenhouse fuel emissions. yet we needs to comprehend totally what study should be performed and the way the know-how may be designed and used. This booklet presents a transparent and available evaluate of what the prices and dangers should be, and the way weather engineering may well healthy right into a better software for handling weather switch.
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Additional resources for A Case for Climate Engineering
Longispina, Bosmina, and C. , 1990). These PUFA were also found to be common in fish. It was found that in D. , 1992). D. pulex fed with Aphanizomenon did not accumulate oil drops, although this blue-green alga is not directly toxic for them; on the other hand, when fed with the green protococcous alga Ankistrodesmus, D. pulex did accumulate oil drops (LI: 0 and 3, respectively) (Holm and Shapiro, 1984). Brett et al. (2006) studied the fatty acid composition of D. pulex fed on cryptomonads (Cryptomonas and Rhodomonas), Chlorophyta, and blue-green algae and found that it generally matched that of their algal food.
While green algae may be considered similar to green vascular plants in this respect, algae from other divisions may be highly specific in their physiology and their photosynthetic products. For example, green algae accumulate starch and cellulose, with a small quantity of fat, as the principal products of photosynthesis; diatoms (Bacillariophyceae) mainly produce lipids. PHYSIOLOGY OF THE CLADOCERA % DW % DW % DW 36 4. 1 Content of highly unsaturated fatty acids in dominant groups of planktonic algae.
PHYSIOLOGY OF THE CLADOCERA 40 4. g. amino acids), but this alone is insufficient for their normal lifestyle (Rodina, 1946, 1948, 1950). 3 Introductory Remarks about Lipids The lipid pathway in the aquatic environment starts with lipid formation by plants from initial products of photosynthesis. According to Harwood and Jones (1989, p. ” The chain length of the product may then be elongated and unsaturated bonds may be introduced. Fig. 3 shows the schematic pathway from initial photosynthetic saccharides to lipids and amino acids in algae.
A Case for Climate Engineering by David Keith