Hothouse Earth: Plants and Climate Change

Hothouse Earth: Plants and Climate Change

by Moses Seenarine, 12/19/17

Raising carbon dioxide levels are not necessarily good for agriculture. The benefits of CO2 for plants may be less than previously thought and potentially counteracted by the damaging effects of the proliferation of surface ozone. Agriculture has always faced the challenge of weather variability, and altered agricultural conditions under a transforming climate could exceed farmers’ ability to adapt. 

Farming could easily become adversely affected by (i) extreme heat and escalating water demands; (ii) inflated frequency of severe weather events, such as drought and flood; (iii) sea level rise and flooding of coastal lands; and (iv) modification in crop nutrient content. Variability is also likely to occur in (v) the number and type of pathogens and pests affecting plants and livestock; (vi) altered use of pesticides; (vii) damage to fisheries and aquaculture; and (viii) mycotoxin contamination. 

There are numerous fine-scale processes that can moderate vegetation responses to nitrogen deposits. While smaller amount of nitrogen may act as fertilizer, stimulating growth in plants, large accumulated amounts can (ix) decrease soil health and cause a loss in the number of plant species. These vital food security issues need to be dealt with and modeled into future plans for livestock expansion. 

The reality is animal-based diets will become even less efficient and further wasteful as planetary heating intensifies. The FAO's 2006 and 2013 assessments do not fully factor in the effects of climate warming on plants and crops. In particular, as the land warms, drought may reduce tree productivity and survival across many forest ecosystems. If the vapor-pressure deficit continues to climb, forest drought-stress by the 2050s will exceed that of the most severe droughts in the past 1,000 years. 

The world's food authority uses different baseline scenarios for improved land management for livestock over a 20-year period. But they model weather data from 1987 – 2006. This climate assumption is challenged by recent weather-related (a) lower crop yields, (b) feed crop failures, and (c) livestock die-offs. Upwards of 60% of crop yield variability can be attributed to climate irregularity. And unnervingly, this variation occurs in regions that are principal producers of major crops, like the Midwestern US, the North China Plains, western Europe and Japan. 

Direct climate impacts to maize, soybean, wheat, and rice under a RCP 8.2 scenario could involve average losses of 400–2,600 calories, or 8 to 43% of the present-day total. Freshwater limitations in some heavily irrigated regions could necessitate reversion of 20–60 Mha (77k – 231k mi) of cropland from irrigated to rain-fed management, and a further loss of 600–2,900 Pcal. 

These projections are a major cause for concern. Many subtropical arid and semi-arid regions will probably experience less precipitation. In wet tropical regions, extreme precipitation events will be further intense and frequent. Monsoon onset dates will start earlier while withdrawal rates are going to be delayed, resulting in a lengthening of the season. Tropical cyclones are expected to become extra intense, with stronger winds and heavier rainfall. In addition, variability of climate, such as El Niño events, has large impacts on crop production. 

Africa will be the part of the world that is most vulnerable to climate variability and alteration. East Africa will experience further short rains, while west Africa will get heavier monsoons. Much higher temperatures could reduce the length of the growing period in some parts of Africa by up to 20%. 

Excerpt from "Meat Climate Change: The 2nd Leading Cause of Global Warming," by Dr. Moses Seenarine.

Who Should We Feed - Animals or People?

Who Should We Feed - Animals or People?

by Moses Seenarine, 12/19/17

Worldwide, two billion people live primarily on an animal-based diet, while double that sum, or 4 billion people, live primarily on a plant-based diet. In fact, the  United Nations Environment Programme (UNEP) estimated that calories lost from feeding cereals to animals could feed an extra 3.5 billion people. 

Another report calculated that 4 billion people could be fed with the crops devoted to livestock. The single biggest intervention to free up calories would be to stop using grains for cow carcass production in the US. By far, the US, China, and Western Europe account for the bulk of the 'diet gap,' and corn is the main crop being diverted to animal feed. 

By moderating diets from food animals, choosing less resource-demanding animal products, and maintaining non-feed systems, around 1.3 and 3.6 billion more people could fed. And ending consumer waste of animal calories could feed an additional 235 million people. The WHO estimated that the number of people fed in a year per hectare (2.5 acres) ranged from 22 individuals for potatoes and 19 for rice, to one and two persons, respectively for cow and sheep carcass. The agency added that the low energy conversion ratio from feed to carcass is a concern since the cereal grain being produced is diverted to livestock. 

A Bangladeshi family living off rice, beans, vegetables and fruit may live on an acre of land or less. In sharp contrast, the average American, who consumes around 270 pounds of animal carcass a year, needs 20 times that. The current global average animal consumption is 100g (3.5 oz) per person per day, with about a ten-fold variation between high-consuming and low-consuming populations. 

For most people in developing countries who obtain their protein from plants, eating animal flesh is a luxury. A kilogram (2.2 lb) of animal carcass can cost from $2 to $5 in the local markets, which is several days’ wages. A typical African eats only 20 kg (44 lb) of animal flesh a year, well below the world average. These findings suggest that over-consumption and dietary habits are of the essence for understanding resource use and GHG pollution, as opposed to expanding population being the primary driver as is popularly argued. 

That is, population's importance is related to lifestyle expenditures, and specifically to the over-consumption class. A 2011 report concludes, “The mass consumption of animals is a primary reason why humans are hungry, fat, or sick and is a leading cause of the depletion and pollution of waterways, the degradation and deforestation of the land, the extinction of species, and the warming of the planet."

Excerpt from "Meat Climate Change: The 2nd Leading Cause of Global Warming," by Dr. Moses Seenarine.

Growth for Who? Defining Progress by Under-Counting the Hungry Masses

Growth for Who? Defining Progress by Under-Counting the Hungry Masses

by Moses Seenarine, 12/15/17

Malnutrition affects one in every three people worldwide. It affects all age groups and populations, and plays a major role in half of the 10 million annual child deaths in the developing world. In the children who survive, malnutrition continues to be a cause and a consequence of disease and disability. 

The most visible form of hunger is famine, a true food crisis in which multitudes of people in an area starve and die. There are over 850 million people who are chronically hungry. This is the largest number and proportion of malnourished people ever recorded in human history. Plus, being underweight is a major problem globally. A quarter of women in India and Bangladesh are underweight. And a fifth of men in India, Bangladesh, Timor, Afghanistan, Eritrea and Ethiopia are underweight. Being underweight put a person at risk for multiple health problems including anemia, infertility and osteoporosis. 

In the entire developing world, or Global South, hunger and poverty are intense and may worsen as economic growth across the world stalls. From 2005 and 2008 food prices almost doubled. To make matters worse, from 2007, there has been a sizable slowdown in food aid, bringing hunger reduction "essentially to a halt for the developing countries as a whole." 

As many as 2.8 billion people on the planet struggle to survive on less than $2 a day, and upwards of one billion people lack reasonable access to safe drinking water. There is an enormous and persistent food gap between the global South and the developed north. To illustrate, the average person in the industrial world took in 10% more calories daily in 1961 than the average person in the developing world consumes today. The large numbers of poor and malnourished people in the world are unacceptably high, but these numbers may be much higher due to under-counting. 

Misleadingly, the UN set the threshold for hunger as the minimum calories needed for a "sedentary lifestyle." In reality, the number of hungry people could be as high as 1.5 billion, or in excess of 25% of the world's adult population if the threshold was set as the minimum needed for "normal activity." And numbers of the hungry would jump to 2.6 billion, or nearly 45% of the global adult population, for "intense activity." 

Currently, 4.3 billion people live on less than $5 a day. Although this figure is higher than the World Bank poverty criteria at $1.25 a day, one report showed that a realistic poverty measure would be around $10 a day. By this standard, over three-quarter of humans live in poverty. One-fifth of the Earth's 7 billion people have no land and possessions at all. These "poorest of the poor" are non-literates lacking safe drinking water and living on less than a dollar a day. 

Many spend about 80% of their earnings on food, but still they are hungry and malnourished. The average US house cat eats twice as much protein every day as one of the world's poorest of the poor, and the cost to care for each cat is greater than a poor person's annual income. Half of the world's population have enough food to provide energy, but suffer from individual nutrient deficiencies. Billions of people lack iron, iodine, vitamin A, and other vital nutrients. In addition, racial, ethnic, and religious hatred along with monetary greed cause food deprivation for whole groups of people. 

The IPCC's AR5 report suggest that climate transformation will affect poor countries the most, and inflate food insecurity. While Oxfam predicts world hunger will worsen as planetary heating inevitably affects crop production and disrupt incomes. The number of people in the peril of hunger might climb by 10% to 20% by 2050, but daily per capita calorie availability is falling across the world.

Excerpt from "Meat Climate Change: The 2nd Leading Cause of Global Warming," by Dr. Moses Seenarine.