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Bjorn Lomborg

Climate change isn’t causing hunger

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7 minute read

From the Fraser Institute

By Bjørn Lomborg

Surprisingly, a green, low-carbon world produces less and more expensive food, and makes over 50 million more people hungry by mid-century.

Food scarcity affects many people around the world. Canada can help, as the world’s fifth largest exporter of agricultural goods and the fourth largest exporter of wheat. Indeed, Canada exports so much food that measured in calories it can feed more than 180 million people.

We hear often that carbon cuts are a priority because climate change is causing world hunger and that even Canada will be hit by higher prices and less choice. These alarmist claims are far from true, and the recommended policies are counterproductive.

Over the past century, hunger has dramatically declined. In 1928, the League of Nations estimated that more than two-thirds of humanity lived in a constant state of hunger. By 1970, malnutrition afflicted just one-quarter of all people. Since 2008, the world has seen less than one-in-ten of all people go hungry, although Covid and Russia’s invasion of Ukraine have increased the percentage from a low of just over 7 per cent to 9 per cent in 2023.

This positive trend is because humanity has become much better at producing food, and incomes have risen dramatically. For instance, we have more than quintupled cereal production since 1926, and more than halved global food prices. At the same time, extreme poverty has dropped precipitously, allowing parents to afford to buy their children more and better food.

There is obviously still more to do, but securing food for the vast majority of the world has been an unmitigated success in the human development story.

As we move towards 2050, it is likely incomes will keep increasing, with extreme poverty almost disappearing. At the same time, food prices will likely slightly decline or stay about the same, as even more people switch to higher-quality and more expensive foods. All credible predictions foresee even lower levels of malnutrition by mid-century.

The impact of climate change on food supply is often portrayed as terrible, but in reality, it means that things will get much better slightly slower. It will change conditions for most farmers, making conditions better for some and worse for others. In total, it is likely the net outcome will be worse, but only slightly so. One peer-reviewed estimate shows the climate impact on agriculture is equivalent to reducing global GDP by the end of the century by less than 0.06 per cent.

CO₂ is a plant fertilizer, as is well-known by enterprising tomato producers, who routinely pump CO₂ into their greenhouses to boost productivity. We see a similar impact across the living world. Since the 1970s, the increasing CO₂ concentration has caused the planet to become greener, producing more biomass. Satellites show that since 2000, the world has gotten so many more green leaves that their total area is larger than the entire area of Australia.

In total, models show that without climate change, the global amount of food, measured in calories, produced in 2050 will likely increase 51 per cent from 2010. Even under extreme, unrealistic climate change, it will increase 49 per cent. Across all models and scenarios, the difference in calories per person is one-tenth of a percent.

Deaths from malnutrition chart

The graph shows how many children died each year from malnutrition from 1990 to 2021, with the World Health Organization estimating the impact of climate change up to 2050. Since 1990, the average number of children dying has declined dramatically from 6.5 million to 2.5 million each year. This is an incredible success story.

The WHO expects the decline to continue, with annual deaths halving once again. But in a world with climate change, deaths will still decline but slightly more slowly. Unfortunately, the lower death decline in 2050 created almost all the media headlines from the WHO study, entirely ignoring the dramatic reduction in overall death.

The overarching response from climate campaigners is to demand radical emission cuts to help. But this ignores two important facts. First, trying to affect change through climate policy is the slowest, costliest and least impactful way to help. While even significant climate policy will take over half a century to have any measurable impact and cost hundreds of trillions, it will at best help increase available calories by less than one-tenth of a percentage point. Instead, a focus on increased economic growth is over one hundred times more effective, increasing calorie availability by over 10 per cent. Moreover, it would work in years instead of centuries, and deliver a host of other, obvious benefits.

Second, cutting emissions increases most agricultural costs, like pushing up prices for fertilizer and gas for tractors, along with increased competition for land for biofuels and reforestation. Uselessly, most models just ignore these costs — like the WHO simply imagining a world without climate change. But it turns out that the impact of cutting emissions harms food production much more than climate change does. Surprisingly, a green, low-carbon world produces less and more expensive food, and makes over 50 million more people hungry by mid-century.

While we are being told stories of climate agricultural catastrophes and urged to cut emissions dramatically, the evidence shows that the impact is tiny, making the world improve slightly less fast. The proposed cure is worse than the problem it seeks to fix.

Bjørn Lomborg

Bjorn Lomborg

How Canada Can Respond to Climate Change Smartly

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From the Fraser Institute

By Bjørn Lomborg

At a time when public finances are strained, and Canada and the world are facing many problems and threats, we need to consider policy choices carefully. On climate, we should spend smartly to solve it effectively, making sure there is enough money left over for all the other challenges.

A sensible response to climate change starts with telling it as it is. We are bombarded with doom-mongering that is too often just plain wrong. Climate change is a problem but it’s not the end of the world.

Yet the overheated rhetoric has convinced governments to spend taxpayer funds heavily on subsidizing current, inefficient solutions. In 2024, the world spent a record-setting CAD$3 trillion on the green energy transition. Taxpayers are directly and indirectly subsidizing millions of wind turbines and solar panels that do little for climate change but line the coffers of green energy companies.

We need to do better and invest more in the only realistic solution to climate change: low-carbon energy research and development. Studies indicate that every dollar invested in green R&D can prevent $11 in long-term climate damages, making it the most effective long-term global climate policy.

Throughout history, humanity has tackled major challenges not by imposing restrictions but by innovating and developing transformative technologies. We didn’t address 1950s air pollution in Los Angeles by banning cars but by creating the catalytic converter. We didn’t combat hunger by urging people to eat less, but through the 1960s Green Revolution that innovated high-yielding varieties to grow much more food.

In 1980, after the oil price shocks, the rich world spent more than 8 cents of every $100 of GDP on green R&D to find energy alternatives. As fossil fuels became cheap again, investment dropped. When climate concern grew, we forgot innovation and instead the focus shifted to subsidizing existing, ineffective solar and wind.

In 2015, governments promised to double green R&D spending by 2020, but did no such thing. By 2023, the rich world still wasn’t back to spending even 4 cents out of every $100 of GDP.

Globally, the rich world spends just CAD$35 billion on green R&D — one-hundredth of overall “green” spending. We should increase this four-fold to about $140 billion a year. Canada’s share would be less than $5 billion a year, less than a tenth of its 2024 CAD$50 billion energy transition spending.

This would allow us to accelerate green innovation and bring forward the day green becomes cheaper than fossil fuels. Breakthroughs are needed in many areas. Take nuclear power. Right now, it is way too expensive, largely because extensive regulations force the production of every new power plant into what essentially becomes a unique, eye-wateringly expensive, extravagant artwork.

The next generation of nuclear power would work on small, modular reactors that get type approval in the production stage and then get produced by the thousand at low cost. The merits of this approach are obvious: we don’t have a bureaucracy that, at a huge cost, certifies every consumer’s cellphone when it is bought. We don’t see every airport making ridiculously burdensome requirements for every newly built airplane. Instead, they both get type-approved and then mass-produced.

We should support the innovation of so-called fourth-generation nuclear power, because if Canadian innovation can make nuclear energy cheaper than fossil fuels, everyone in the world will be able to make the switch—not just rich, well-meaning Canadians, but China, India, and countries across Africa.

Of course, we don’t know if fourth-generation nuclear will work out. That is the nature of innovation. But with smarter spending on R&D, we can afford to focus on many potential technologies. We should consider investing in innovation to grow hydrogen production along with water purification, next-generation battery technology, growing algae on the ocean surface producing CO₂-free oil (a proposal from the decoder of the human genome, Craig Venter), CO₂ extraction, fusion, second-generation biofuels, and thousands of other potential areas.

We must stop believing that spending ever-more money subsidizing still-inefficient technology is going to be a major part of the climate solution. Telling voters across the world for many decades to be poorer, colder, less comfortable, with less meat, fewer cars and no plane travel will never work, and will certainly not be copied by China, India and Africa. What will work is innovating a future where green is cheaper.

Innovation needs to be the cornerstone of our climate policy. Secondly, we need to invest in adaptation. Adaptive infrastructure like green areas and water features help cool cities during heatwaves. Farmers already adapt their practices to suit changing climates. As temperatures rise, farmers plant earlier, with better-adapted varieties or change what they grow, allowing the world to be ever-better fed.

Adaptation has often been overlooked in climate change policy, or derided as a distraction from reducing emissions. The truth is it’s a crucial part of avoiding large parts of the climate problem.

Along with innovation and adaptation, the third climate policy is to drive human development. Lifting communities out of poverty and making them flourish is not just good in and of itself — it is also a defense against rising temperatures. Eliminating poverty reduces vulnerability to climate events like heat waves or hurricanes. Prosperous societies afford more healthcare, social protection, and investment in climate adaptation. Wealthy countries spend more on environmental preservation, reducing deforestation, and promoting conservation efforts.

Focusing funds on these three policy areas will mean Canada can help spark the breakthroughs that are needed to lower energy costs while reducing emissions and making future generations around the world more resilient to climate and all the other big challenges. The path to solving climate change lies in innovation, adaptation, and building prosperous economies.

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Bjorn Lomborg

Net zero’s cost-benefit ratio is crazy high

Published on

From the Fraser Institute

By Bjørn Lomborg

The best academic estimates show that over the century, policies to achieve net zero would cost every person on Earth the equivalent of more than CAD $4,000 every year. Of course, most people in poor countries cannot afford anywhere near this. If the cost falls solely on the rich world, the price-tag adds up to almost $30,000 (CAD) per person, per year, over the century.

Canada has made a legal commitment to achieve “net zero” carbon emissions by 2050. Back in 2015, then-Prime Minister Trudeau promised that climate action will “create jobs and economic growth” and the federal government insists it will create a “strong economy.” The truth is that the net zero policy generates vast costs and very little benefit—and Canada would be better off changing direction.

Achieving net zero carbon emissions is far more daunting than politicians have ever admitted. Canada is nowhere near on track. Annual Canadian CO₂ emissions have increased 20 per cent since 1990. In the time that Trudeau was prime minister, fossil fuel energy supply actually increased over 11 per cent. Similarly, the share of fossil fuels in Canada’s total energy supply (not just electricity) increased from 75 per cent in 2015 to 77 per cent in 2023.

Over the same period, the switch from coal to gas, and a tiny 0.4 percentage point increase in the energy from solar and wind, has reduced annual CO₂ emissions by less than three per cent. On that trend, getting to zero won’t take 25 years as the Liberal government promised, but more than 160 years. One study shows that the government’s current plan which won’t even reach net-zero will cost Canada a quarter of a million jobs, seven per cent lower GDP and wages on average $8,000 lower.

Globally, achieving net-zero will be even harder. Remember, Canada makes up about 1.5 per cent of global CO₂ emissions, and while Canada is already rich with plenty of energy, the world’s poor want much more energy.

In order to achieve global net-zero by 2050, by 2030 we would already need to achieve the equivalent of removing the combined emissions of China and the United States — every year. This is in the realm of science fiction.

The painful Covid lockdowns of 2020 only reduced global emissions by about six per cent. To achieve net zero, the UN points out that we would need to have doubled those reductions in 2021, tripled them in 2022, quadrupled them in 2023, and so on. This year they would need to be sextupled, and by 2030 increased 11-fold. So far, the world hasn’t even managed to start reducing global carbon emissions, which last year hit a new record.

Data from both the International Energy Agency and the US Energy Information Administration give added cause for skepticism. Both organizations foresee the world getting more energy from renewables: an increase from today’s 16 per cent to between one-quarter to one-third of all primary energy by 2050. But that is far from a transition. On an optimistically linear trend, this means we’re a century or two away from achieving 100 percent renewables.

Politicians like to blithely suggest the shift away from fossil fuels isn’t unprecedented, because in the past we transitioned from wood to coal, from coal to oil, and from oil to gas. The truth is, humanity hasn’t made a real energy transition even once. Coal didn’t replace wood but mostly added to global energy, just like oil and gas have added further additional energy. As in the past, solar and wind are now mostly adding to our global energy output, rather than replacing fossil fuels.

Indeed, it’s worth remembering that even after two centuries, humanity’s transition away from wood is not over. More than two billion mostly poor people still depend on wood for cooking and heating, and it still provides about 5 per cent of global energy.

Like Canada, the world remains fossil fuel-based, as it delivers more than four-fifths of energy. Over the last half century, our dependence has declined only slightly from 87 per cent to 82 per cent, but in absolute terms we have increased our fossil fuel use by more than 150 per cent. On the trajectory since 1971, we will reach zero fossil fuel use some nine centuries from now, and even the fastest period of recent decline from 2014 would see us taking over three centuries.

Global warming will create more problems than benefits, so achieving net-zero would see real benefits. Over the century, the average person would experience benefits worth $700 (CAD) each year.

But net zero policies will be much more expensive. The best academic estimates show that over the century, policies to achieve net zero would cost every person on Earth the equivalent of more than CAD $4,000 every year. Of course, most people in poor countries cannot afford anywhere near this. If the cost falls solely on the rich world, the price-tag adds up to almost $30,000 (CAD) per person, per year, over the century.

Every year over the 21st century, costs would vastly outweigh benefits, and global costs would exceed benefits by over CAD 32 trillion each year.

We would see much higher transport costs, higher electricity costs, higher heating and cooling costs and — as businesses would also have to pay for all this — drastic increases in the price of food and all other necessities. Just one example: net-zero targets would likely increase gas costs some two-to-four times even by 2030, costing consumers up to $US52.6 trillion. All that makes it a policy that just doesn’t make sense—for Canada and for the world.

Bjørn Lomborg

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