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Could seaweed be the 'fastest and least expensive' tool to fight climate change?

nationalgeographic.com

131–140 of 199 posts

Re: Could seaweed be the 'fastest and least expensive' tool to fight climate change?

#131
post #87

There won't be any ingenious, miracle carbon removal solution and various proposals may even be flirting with ecological disasters of planetary proportions. Anything that expands our footprint in order to mitigate our footprint is a dubious direction. Reminds of an apprentice wizard that panics and invokes a sequence of spells, each one worse than the other. Discussions and thinking around sustainability underestimat…

>There won't be any ingenious, miracle carbon removal solutions OK but I think there will be.

Ok - why, specifically? Or is just ... this feeling you have?

Re: Could seaweed be the 'fastest and least expensive' tool to fight climate change?

#132
post #65

What does success look like in the climate change fight? Is there a point where victory can ever be declared? Is that a "correct" temperature (what is it) or a CO2 PPM number (what's ideal)? When industry and scientists stop lobbying for money to fight it?

If we bring global CO2 back down to 280 ppm (like it was in the year 1700[1]), then a lot of today's farming methods will have substantially lower yields. Our modern crops need those higher CO2 levels to grow fast[2]. Without other ways to grow more food, people will starve. [1]: https://www.co2levels.org/img/graph_grid.png [2]: https://extension.okstate.edu/fact-sheets/images/greenhouse-...

Worry not. We'll be very lucky if we ever get below 450.

Re: Could seaweed be the 'fastest and least expensive' tool to fight climate change?

#133
post #57

Most of the ocean is desert lacking the limiting nutrients of nitrogen, phosphorous and iron. If we can cheaply fertilize large swathes of the ocean with these limiting nutrients in a controlled manner, then this could trigger massive algae blooms that on sinking sequester massive amounts of carbon.

Algae blooms result in de-oxygenated water, no? (Among other consequences.) https://www.cdc.gov/habs/environment.html

it depends on the context

Re: Could seaweed be the 'fastest and least expensive' tool to fight climate change?

#134

Earlier quoted context omitted.

While I agree, how do you recommend we reduce emissions immediately, which is basically when it needs to happen. It seems like largely people just don't care about the environment on a "general global" scale. There are pockets are people/groups/countries that do. But on average people don't. So that leaves really one solution, which is attempting to reduce the amount of existing emissions to stop the rise to some deg…

> It seems like largely people just don't care about the environment on a "general global" scale. The issue is not really people. The worst emitters are out of reach from us. It’s good to make people more conscious of their environmental impact but what good does it really make when what is saved is a minute of energy production by the average Chinese coal power plant.

Most of the emissions are people-related: https://www.epa.gov/ghgemissions/global-greenhouse-gas-emiss...

People who want food, transportation, electricity, heat, concrete, etc.

Re: Could seaweed be the 'fastest and least expensive' tool to fight climate change?

#135
post #98

Earlier quoted context omitted.

How? Unless you get a breakthrough with fusion, I just don’t see us finding the energy to make carbon removal feasible. You either need huge tracts of land to power forests, or massive amounts of energy from another source to do it with tech, and neither of those is going to be the easy fix people believe is coming.

It's hard to imagine how someone can look at the track record and then think "impossible! we will never figure it out!" when human history is basically a detailed record of us constantly "figuring things out" that previously seemed impossible. When something has yet to be figured out you are supposed to be baffled because the part where it all make sense doesn't come until after we figure it out. It doesn't guarantee…

I appreciate the case for optimism, and I agree that as a species we can be quite clever. We can also fail to address important issues with simple and obvious fixes in ways that boggle the mind (e.g. getting vaccinated or wearing masks during COVID). Whereas I might have once thought that our ingenuity would rule the day, it seems like a functional society requires more than just technology.

Re: Could seaweed be the 'fastest and least expensive' tool to fight climate change?

#136
post #71

Earlier quoted context omitted.

Looking at the technology trajectories of PV and wind it is pretty clear that within the next 5 to 15 years many countries will start seeing substantial extra electricity being generated by the build out of renewables. Because countries will aim to cover most electricity by renewables and thus overprovision them for dark windless winters, it is likely that there will be massive amounts of energy available during the…

So, how do you apply this to carbon sequestration in seaweed ?

I don't think there is an easy way, so that's why I think this is will not be one of the key things to solve the climate crisis.

Re: Could seaweed be the 'fastest and least expensive' tool to fight climate change?

#137

Earlier quoted context omitted.

I think it's interesting that Homo sapiens evolved during the last ice age where the climate was significantly different than today's climate. We already "won" a major climate change once despite having a level of technology barely better than sharp sticks and pelt cloaks. Instead of defining success based on climate stability itself, I think it makes more sense to define success in terms of what we care about: a thr…

> catastrophic loss of human population At the same time, the population has been booming to the point that close to half of the humans who ever existed are alive on Earth right now. This is a significant part of the current crisis actually.

I remember reading, admittedly in a couple of science-fiction books, that the estimated number of humans that have ever existed is about 100 billion. Was that estimate wildly exaggerated? Or has it been dramatically reduced in recent decades?

Re: Could seaweed be the 'fastest and least expensive' tool to fight climate change?

#138
post #87

There won't be any ingenious, miracle carbon removal solution and various proposals may even be flirting with ecological disasters of planetary proportions. Anything that expands our footprint in order to mitigate our footprint is a dubious direction. Reminds of an apprentice wizard that panics and invokes a sequence of spells, each one worse than the other. Discussions and thinking around sustainability underestimat…

>There won't be any ingenious, miracle carbon removal solutions OK but I think there will be.

In the context of the post you're replying to, that's like believing there will be a miracle pill so you can eat whatever you want, however much you want, drink as much alcohol as you want, and the magic pill will prevent obesity, cancer, heart disease, and liver failure.

And even if such a miracle drug did exist, if seems like the better solution is to simply lead a healthier lifestyle to begin with.

Re: Could seaweed be the 'fastest and least expensive' tool to fight climate change?

#139

Earlier quoted context omitted.

> It seems like largely people just don't care about the environment on a "general global" scale. The issue is not really people. The worst emitters are out of reach from us. It’s good to make people more conscious of their environmental impact but what good does it really make when what is saved is a minute of energy production by the average Chinese coal power plant.

Most of the emissions are people-related: https://www.epa.gov/ghgemissions/global-greenhouse-gas-emiss... People who want food, transportation, electricity, heat, concrete, etc.

That’s a sector breakdown of emission. That doesn’t address my point at all. Everything human is people related at some point or we wouldn’t be doing it.

As you can see the most emitting sector is energy production. That’s mostly driven by countries using coal as energy source and countries with significant oil and gas reserves. It is a lever at the strategical and political level. Same with industry where gains are mostly achieved through regulation.

Construction is direly in need of innovation regarding its emission but unless you want people to sleep in the street remains somewhat unavoidable.

That leaves agricultures where people have a huge role to play by consuming less meat and somewhat transportation (even if that’s actually extremely linked to the offer of effective public transport).

For the rest and as much as I would like to believe in it, most actions I see people doing are actually fairly inconsequential in the grand scheme of things. I’m a bit annoyed by it because it somehow lulls people into thinking they are doing something for the problem while the actual issues stay unaddressed.

Re: Could seaweed be the 'fastest and least expensive' tool to fight climate change?

#140
post #87

Earlier quoted context omitted.

>There won't be any ingenious, miracle carbon removal solutions OK but I think there will be.

In the context of the post you're replying to, that's like believing there will be a miracle pill so you can eat whatever you want, however much you want, drink as much alcohol as you want, and the magic pill will prevent obesity, cancer, heart disease, and liver failure. And even if such a miracle drug did exist, if seems like the better solution is to simply lead a healthier lifestyle to begin with.

Fusion is the key. Replace all of our dirty energy, and produce enough surplus to sequester carbon.

We should be pursuing fusion as if the survival of the planet depends on it…because it is likely that it does.

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