4 ms·

Hacking Photosynthesis

27 points by prostoalex 4y ago

tuatoru 4y ago
> Food production will need to roughly double to fully feed ten billion people, the world’s expected population by 2050. I wish people would quit saying this. There are 8-ish billion people now. About 3 billion of them have amounts of food well in excess of dietary requirements - nearly double.[1] That's after processing, distribution, and storage losses. About 1 billion don't have quite enough food, or quite enough variety. We may need better food distribution and storage, but we don't need more food production. ---- 1. In normal years. The global harvest this year will be very interesting, due to major droughts in China and Western Europe and the war in Ukraine. The huge heatwave in India earlier may also have lingering effects. Food is "vital to national security", though, so we may never get an accurate picture. One of the predicted-for-later-on effects of climate change is that it greatly increases the chances of simultaneous harvest failure in two or more of the six major food production regions of the globe. (Failure being reduction by 10% or more from expectation.) From "one in a thousand years" to "one in ten years", or more often. I wasn't expecting to have a preview of this effect just yet.
- chrisco255 4y ago
  Indian wheat crops were down less than 3% from previous year. Still 3 million tons higher than the 5 year average. Overall foodgrain production is expected to hit an all time high this year (315 million tons). “Record production is estimated of rice, maize, gram, pulses, rapeseed and mustard, oilseeds and sugarcane,” the ministry statement read. [1] I understand the news makes it seem like the world is falling apart at the seams, but the apocalypse has been cancelled by reality, this year, yet again. [1] https://indianexpress.com/article/business/commodities/india-fourth-advance-estimate-2021-22-crop-year-wheat-production-rice-maize-gram-pulses-mustard-sugarcane-8095246/ https://indianexpress.com/article/business/commodities/india...
googlryas 4y ago
Here's my stupid idea: It's my understanding that plants only respond to a fairly narrow band of light, somewhere between 400 nm and 700 nm wavelengths. All the other solar energy is more or less wasted on them. Could we have a solar panel that collected energy from a wide range of light wavelengths, and then used that energy to create light that is concentrated mostly in the 400-700nm range, thereby possibly giving a > 100% efficiency from the perspective of plant growth.
- bilsbie 4y ago
  Also mirrors. Any light that misses the leaf gets reflected and gets another chance at reaching the leaf.
- flobosg 4y ago
  Light-harvesting complexes allow to expand the wavelength range of absorption: https://en.wikipedia.org/wiki/Light-harvesting_complex https://en.wikipedia.org/wiki/Light-harvesting_complex
- doublerebel 4y ago
  It is certainly possible to optimize the light spectrum for desired plant growth traits. An interesting and successful experiment over the years was http://ledgrow.eu http://ledgrow.eu , which culminated in producing a product. (No affiliation)
donkarma 4y ago
yeah but we're getting more and more plants that are bigger and heavier but contain the same amount of nutrients or even lower so you're paying for calories instead of shit you need

27 points by prostoalex 4y ago

> Food production will need to roughly double to fully feed ten billion people, the world’s expected population by 2050. I wish people would quit saying this. There are 8-ish billion people now. About 3 billion of them have amounts of food well in excess of dietary requirements - nearly double.[1] That's after processing, distribution, and storage losses. About 1 billion don't have quite enough food, or quite enough variety. We may need better food distribution and storage, but we don't need more food production. ---- 1. In normal years. The global harvest this year will be very interesting, due to major droughts in China and Western Europe and the war in Ukraine. The huge heatwave in India earlier may also have lingering effects. Food is "vital to national security", though, so we may never get an accurate picture. One of the predicted-for-later-on effects of climate change is that it greatly increases the chances of simultaneous harvest failure in two or more of the six major food production regions of the globe. (Failure being reduction by 10% or more from expectation.) From "one in a thousand years" to "one in ten years", or more often. I wasn't expecting to have a preview of this effect just yet.

chrisco255 4y ago
Indian wheat crops were down less than 3% from previous year. Still 3 million tons higher than the 5 year average. Overall foodgrain production is expected to hit an all time high this year (315 million tons). “Record production is estimated of rice, maize, gram, pulses, rapeseed and mustard, oilseeds and sugarcane,” the ministry statement read. [1] I understand the news makes it seem like the world is falling apart at the seams, but the apocalypse has been cancelled by reality, this year, yet again. [1] https://indianexpress.com/article/business/commodities/india-fourth-advance-estimate-2021-22-crop-year-wheat-production-rice-maize-gram-pulses-mustard-sugarcane-8095246/ https://indianexpress.com/article/business/commodities/india...

googlryas 4y ago

Here's my stupid idea: It's my understanding that plants only respond to a fairly narrow band of light, somewhere between 400 nm and 700 nm wavelengths. All the other solar energy is more or less wasted on them. Could we have a solar panel that collected energy from a wide range of light wavelengths, and then used that energy to create light that is concentrated mostly in the 400-700nm range, thereby possibly giving a > 100% efficiency from the perspective of plant growth.

bilsbie 4y ago
Also mirrors. Any light that misses the leaf gets reflected and gets another chance at reaching the leaf.
flobosg 4y ago
Light-harvesting complexes allow to expand the wavelength range of absorption: https://en.wikipedia.org/wiki/Light-harvesting_complex https://en.wikipedia.org/wiki/Light-harvesting_complex
doublerebel 4y ago
It is certainly possible to optimize the light spectrum for desired plant growth traits. An interesting and successful experiment over the years was http://ledgrow.eu http://ledgrow.eu , which culminated in producing a product. (No affiliation)

donkarma 4y ago

yeah but we're getting more and more plants that are bigger and heavier but contain the same amount of nutrients or even lower so you're paying for calories instead of shit you need