There's what is. There's what might be. And then there's what probably should be.

I have 'do what?!' sensors. And when I read something like this they get put on alert: ‘Fertilising’ oceans with iron may combat climate change

Now I like science along with the next fellow. I also really like things that can help. But when I see something that 'may' work being written up so factually, especially when it's about a short-term mitigation 'solution' of dubious merit that impacts the rest of the planet, I do wonder why it's up there.

It's only later you get to find out that there are some down sides. Mind you, lobbing a ton of car in to get back 100,000 tons of C02 seems like a deal... if it works. Maybe we could set up a ramp at Land's End. Furthest out gets a prize. I know, a trip to the Antarctic!

Meanwhile this, which I saw in passing, seemed more of a worry: Rapeseed biofuel ‘produces more greenhouse gas than oil or petrol’ - then you read the comments. What to believe?

Tinkers those journos, eh?

What's big, yellow...

I was never good at those shark in the custard jokes.

Two letters in reply to a piece I missed in the Indy (which I am sure is traceable):

Sir: Your feature on the huge area of land occupied by oilseed rape (12 May) made me recall a conversation with my father, a former airline pilot. I remarked about how much of France and England were covered in yellow fields and he said that this was how you could tell, from 37,000 feet, where the boundaries of the EU were. Present airline pilots may like to confirm if this is still the case. This would seem to indicate that the supply of oilseed rape products is determined by subsidy, rather than demand.

Sir: "The Rape of Spring"?(article, 12 May) "Garish"; "Slicks of Day-Glo yellow"; "an intercontinental crisis"? What an emotive introduction to a report that fails to find any evidence for a major role for oilseed rape in hay fever. This is a crop that produces a useful and healthy oil, which could also help to cut our carbon dioxide production.

Interesting. I am also keen to understand how it helps cut our CO2 production.

This allows me to air one of my odd ponders, like what happens to the inland climate if we suck all the energy out of the air coming in from the sea with wind farms (just asking - it may be minimal).

I remember an album from my youth, called, I think, Albedo 0.39, which was the reflectivity of the Earth.

My ponder is what the effect of such high reflectivity crops are vs. a darker green on the whole sun beating down thing? One has to presume there may be one if the coverage gets significant.

It struck me as I was leaving the UK for Geneva to help save the planet with RE:tie. By air, I have to admit. But as the Indy did point out yesterday - Deforestation: The hidden cause of global warming (I must mention two things. One is that I do recall us all being a bit worried about cutting down rain forests even when I was a kid, so how hidden it is/was escapes me. Two: that's no excuse to keep on wasting away now) - the whole travel thing rather pales (pun intended) in comparison to other effects... possibly.

Grist - If not an answer, a lead to further info