Agriculture’s own 3 Body Problem

Popularised recently in novels and television, the Three Body Problem is a long-standing physics question that attempts to solve for the dynamic movements of three large celestial bodies, each influencing one another under their own gravitational pull. No simple or general closed-form solution exists, and starting conditions can transform unpredictably. Small changes compound quickly, producing wildly different outcomes.

It is a fitting metaphor for our food systems today.

We are trying to steer our food future through its own "trilemma": a Food Gap, a Land Gap, and a Climate Gap—all of which have large knock-on effects on one another.

Body #1: The Food Gap

The World Resources Institute (WRI) estimates crop production must rise 56% between 2010 and 2050. Earlier projections from the UN Food and Agriculture Organisation put the figure as high as 70%.
This surge is driven not only by population growth; projected to reach nearly 10 billion, but more significantly by a nutrition transition in the developing world.
As incomes rise, billions of people are rightfully diversifying their diets, moving away from starchy staples toward resource intensive foods like meat, dairy, and vegetable oils.
This demand is rigid. While food waste reduction and dietary shifts can mitigate it, the absolute requirement to produce more calories is inescapable.

To visualize closing this food gap: we would need to replicate the entire combined 2010 agricultural output of the world's three largest food producers: China, India, and the United States. Failure to close this gap results in price spikes and unpredictable costs, which disproportionately affect the global poor, exacerbating hunger and geopolitical instability, stalling economic development and are recipes for humanitarian disasters.

Body #2: The Land Gap

We assume crop and pasture yields will continue growing at historical rates—but without any “magic silver bullets” that will exponentially accelerate progress.

The world will need to expand its agricultural footprint by nearly 593 million hectares by 2050 to meet projected demand. This area is roughly twice the size of India.

Agriculture already occupies nearly half of the world’s habitable land. The remaining land consists of natural ecosystems that provide essential environmental services such as regulating our global climate and housing the majority of terrestrial biodiversity.

There is no "spare" land. Every hectare of new farmland comes at the expense of a natural ecosystem. To put 593 million hectares in an alternate perspective, it represents an area larger than the entire Amazon rainforest.

Body #3: The Climate Gap

Agricultural emissions are often understated at 13–21% when measured only by production variables like fertilisers, methane, fuels, and energy. However, when we account for the full food system, including land use change and supply chains, the share rises to roughly 34%, or one-third of global greenhouse gas emissions.

To limit global warming to 2°C, or the more ambitious 1.5°C target, agriculture must drastically reduce its emissions. And when we take into consideration the opportunity cost of carbon when land conversion is factored in, which is to say, if agriculture expands by 593 million hectares to meet food demand, the resulting emissions from deforestation and soil disturbance would make meeting the Paris Agreement goals biophysically impossible, even if the world completely eliminated fossil fuels.

This is how the “trilemma” plays out.

We cannot close the Food Gap by widening the Land Gap, or we fail the Climate Gap. We cannot close the Climate Gap by ignoring the Food Gap, or we cause humanitarian disaster.

• Push production with business as usual methods - Food Gap shrinks, Land Gap and Climate Gap worsen.

• Lock down land to protect forests - Land Gap improves, but Food Gap and prices worsen unless yields and demand-side measures compensate.

• Cut emissions without protecting output - Climate Gap improves on paper, Food Gap reappears via scarcity.

A Practical Path Forward

We must produce 56% more food on the same amount of land, effectively closing the Land Gap to zero.

No single intervention can close the full 56% yield gap. We need a stack of solutions for sustainable intensification - more output per hectare, with sharply lower marginal harm.

1. Relentless closure of yield gaps, especially in low-yield systems

Closing yield gaps is the single largest lever for increasing output without expanding cropland. Progress here depends on agronomy, improved genetics, more efficient nutrient and water management, better pest and disease control, addressing soil constraints, and strengthening farmer capability, all deployed at scale.

2. Higher cropping intensity where water allows, and higher water productivity where it does not

Where water availability and infrastructure permit, increasing the number of cropping cycles per year can raise total output per hectare. But further gains from simply expanding irrigation are limited. Additional production will need to come from higher water productivity—producing more food per unit of water used—rather than assuming large new supplies of irrigation water.

3. Demand-side measures that reduce the required increase in production

Reducing food loss and waste directly lowers the amount of additional production needed to meet demand. In WRI’s modeling, the 2050 baseline food gap is 56%. Under more ambitious food loss and waste reduction scenarios, both the size of that gap and the associated land and emissions pressures fall meaningfully.

4. Direct reductions in on-farm and land-use emissions

Sustainable intensification cannot rest on emissions-blind input growth. Improvements in nitrogen-use efficiency, methane mitigation in rice systems, manure management and a shift toward low-carbon energy inputs all need to advance in parallel with yield and resilience gains.

5. Linking yield gains to ecosystem protection

Productivity gains only deliver climate and biodiversity benefits if they are explicitly tied to the protection of natural ecosystems. Otherwise, higher yields can simply make farming more profitable and drive further expansion of the agricultural frontier. Policy, finance, and enforcement mechanisms need to link yield improvements to firm limits on conversion of high-carbon and high-biodiversity lands.

Closing thought: We can’t solve for just one body

The lesson of a three body problem isn't so much so that the future is unknowable. It is that we can't solve for one body and leave the other two where they are, or assume they stay static.
Every fix aimed at a single gap has a backfire built in, which is what the trilemma above shows. So the real question isn't which lever to pull, it is how to get them all pointing the same way.

Arguably, what helps to move the gears toward such alignment is in its economics. Higher yields only spare land if it pays a farmer better to grow more on existing ground than to clear more of it. Take that away and the gains start working against you. The better farming gets, the more profit there is at the frontier, and the faster forests may fall. The protection has to live inside the economics, not in a pledge made alongside it. Make intensifying the cheaper option and the forest stays standing on its own.

This is also where most good ideas die, and where I have spent the last fifteen years. I have watched technology that performs in a trial plot fall apart the day it meets a real farm's costs and habits. The work that matters is rarely the next input or the next sensor. It is taking what already exists and connecting it into something a farmer can run, at a price that holds, with the land math built into the numbers rather than asked for as a favour.

That is the work I do. If you are building in food or climate and that is the problem in front of you, I would be glad to talk.