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Throughout the world, concern for tobacco's consequences for the health of both its voluntary and involuntary consumers has dominated the policy contexts in which health advocates have sought to control its use. The medical, public health, consumer and life insurance constituencies have all largely centred their policies on tobacco around concerns for health. These groups were joined in 1992 by the World Bank, which introduced a non-economic criterion into its lending policies by announcing that it would no longer support tobacco-related projects in developing countries because of health considerations1. Governments' needs for revenue have also shepherded tobacco taxation and trading policies, which have only rarely been explicitly linked to public health policies. Nonetheless, tax policies influence consumption, and so the health of populations. For many years, state- owned tobacco monopolies especially in Eastern Europe and Asia, were able to prevent imports from the tobacco transnationals and the concomitant aggressive marketing campaigns that would have accompanied them. These restrictive trade policies were usually quite disconnected from any explicit concern for the health of the local populations. Egypt for many years banned cigarette imports, again not out of concern for health, but in order to prevent scarce foreign exchange from leaving the country in payment. There remains a third perspective on tobacco control policy that has so far been comparatively neglected and yet which holds enormous potential to draw on the energies of a whole new and powerful constituency, adding further weight to tobacco control efforts. We refer to the environmental consequences of tobacco use, and in particular to the impact of flue- and fire-curing on indigenous forests in impoverished nations where wood is the principal fuel used to cure tobacco prior to its sale. In this issue [xx-xx] we publish three case reports on the environmental and social consequences of tobacco growing in Kenya, Tanzania and Uganda. These papers, produced from researched field trips under PANOS Foundation grants, were highlights of the recent All- Africa Conference on Tobacco and Health held in Harare, Zimbabwe in November 19932. Their publication marks the first significant break in a ten year drought of information on the issue of deforestation caused by tobacco growing and curing in developing countries, and what we believe to be the first papers published to examine the vulnerable underbelly of tobacco industry propaganda about the alleged socio- economic benefits of tobacco growing to peasant farmers in some of the world's poorest nations. At the 5th World Conference on Smoking and Health held in Winnipeg, Canada in 1983, John Madeley, a British developmental agriculture journalist, delivered a paper on tobacco-caused deforestation in Kenya3. Madeley's claims created a wave of concern in the international tobacco control community, but unfortunately have until now been the subject of largely uncritical recitation (see below). Being wrapped in paper and sold in packs, cigarettes are voracious users of paper and paperboard. With paper comprising approximately 5% of the weight of a typical cigarette, and 5,391,971,000,000 cigarettes weighing an average 1.3gm each manufactured in 19924, some 7,009,562 million tonnes of paper is an estimate of paper being currently used in cigarette wrappings alone each year. However, according to a tobacco industry commissioned report, only 16% of the tobacco industry's overall use of forest resources occurs through paper and paperboard products. Curing is by far the major culprit in the industry's exploitation of wood, with 69% of wood consumed by the tobacco industry going to fuelwood used in curing and 15% to poles and sticks used in curing-barn construction5. Flue-cured tobacco currently constitutes 64% of all tobacco grown wordwide6. With flue-curing the green leaf must be kept at high temperatures by the circulated heat for about a week. The process can use a variety of fuels including coal, liquid petroleum gas, or oil, fuels generally available to growers in more affluent countries or to those in nations with abundant natural resources in these fuels. But in most Less Developed Countries (LDCs), local wood is the main fuel used. In the USA, the world's third largest flue-cured tobacco producer, little if any of the crop is cured by fuelwood; Zimbabwe, the fourth largest producer, mostly uses coal; while Brazil, the second largest producer, cures all its crop by burning wood, as do most other African and Third World producing countries7. China, easily the world's largest producer of flue-cured tobacco, in 1993 produced 61% of the world's flue-cured crop6. A recent industry-funded study of tobacco fuelwood use in developing countries stated somewhat cryptically "There are no records that indicate that wood is used for fuel [in China]"5. However, in the absence of any information on the use of other fuels, one might reasonably ask whether there are any records that show that wood is not used in China. How much deforestation is caused by tobacco curing? Startling claims featuring wide disparities have been made about the extent of deforestation caused by felling wood to cure tobacco. In 1976 Muller claimed that wood fuel curing requires about one tree per 300 cigarettes8, a claim repeated in a WHO publication9. Madeley3 suggested that 12% of all world deforestation was caused by tobacco curing, plainly an extravagant claim. An Earthscan report claimed that the crop from a hectare of tobacco requires the felling of one hectare of the adjacent savannah woodland each year10. Another report suggested double that ratio ("Trees from a hectare of land are needed to cure half a hectare of tobacco")11. The latter report made the plainly astronomical claim, without evidence, that one tree in every 12 cut globally for all purposes was used to cure tobacco, a figure that has been repeated in numerous press reports. It also stated "Kenyans are going hungry because millions (sic) of hectares that could grow food are given over instead to growing trees for the curing barns", adding that twelve million trees are cut each year in Kenya to cure tobacco and that "the country is in danger of being turned into a desert". However, even in 1993 Kenya had only 8,805ha under tobacco cultivation6! In semi-arid Malawi, the tobacco-caused deforestation problem is probably more severe than in any other country. In 1984, a World Bank report12 predicted that in Malawi "cutting and burning of all wooded areas is expected within 8 years" - a situation that clearly did not eventuate. However, in 1988 the US Department of Agriculture concluded about the Malawian situation "Despite all of the advances it is doubtful the wood shortage problem will be solved in the near future."13 Very little information is available on the contribution of tobacco to deforestation in Latin America. A review14 of the major causes of deforestation in Central America named cattle ranching and land colonisation by slash and burn subsistence agriculturalists as the principal causes. Tobacco growing was not named. Brazil appears to be the only Latin American country where tobacco-caused deforestation is acknowledged as a major problem. A 1988 Tobacco International report stated that in Southern Brazil there were 93,361 curing barns, and despite some recent efforts with reforestation programs the author described "the devastation of the forests" as looking "less deplorable now than it did 10 years ago"15. The tobacco industry commissions a report Systematic and detailed country-by-country estimates of tobacco-related fuelwood use are not available from any independent research or monitoring agency. To date, the major source of information on the subject has been a report (the International Forest Sciences Consultancy --IFSCC -- report) published in 19865, commissioned by the tobacco industry-funded and directed International Tobacco Information Centre (INFOTAB). An acknowledgment in the report states that "information about the study [was sent by INFOTAB] to tobacco organisations and companies in the countries where fieldwork was to be carried out." In the context of rising international concern about deforestation, desertification, and the greenhouse effect, any industry accused of making a major contribution to these problems would understandably be motivated to "manage" their response to such criticism in the best interests of the industry. In the face of persistent criticism about the role of tobacco in disease causation, the tobacco industry has consistently denied that there is any causal link between active or passive smoking and disease. It also consistently disputes claims that tobacco advertising may be a factor in persuading the young to take up smoking. In each of these areas of dispute, it has often commissioned "independent" researchers to produce reports. Invariably these reports have drawn conclusions that support the tobacco industry's official position, thus placing them at odds with the consensus of scientific opinion determined by major international health agencies. Against this background, tobacco industry-funded consultants' reports on controversial subjects should be read cautiously. In addition, because there is little published evidence available against which its findings may be compared, the report is difficult to assess critically. The report provides information on fuelwood consumption in seven countries (Argentina, Brazil, Kenya, Malawi, Zimbabwe, India, and Thailand). Extrapolations were then made to the 69 main LDCs that grow tobacco. The IFSC report assessed the much-publicised claims that one tree is burnt to cure 300 cigarettes and that one hectare of trees are felled to cure each half hectare of tobacco. A standard way of expressing the quantity of wood used in curing is Specific Fuel Consumption (SFC) which is the number of kilograms of wood required to cure one kilogram of tobacco. The IFSC report suggests that an average cigarette contains 1.3gm of tobacco and an average mature tree in the African savannah has a volume of 0.12m3 and weighs about 90kg, thus the SFC implied by the "one tree for 300 cigarettes" claim is 230kg wood/kg tobacco. Similarly, the report argues that if an average tobacco yield is 1,200kg/hectare and a typical savannah forest hectare contains 80m3 or 60 tonnes of wood, then an SFC of 100kg wood/kg tobacco would apply if the "one hectare of wood to each half hectare of tobacco" claim were correct. The IFSC report cites studies which show SFCs ranging from 12kg/kg (Uganda), 15-20kg/kg (Malawi), 2kg/kg (Brazil) and 13-15kg/kg (Philippines). Each of these are radically lower than the 230kg/kg and 100kg/kg values implied by the popular claims summarised above and well below those reported in the cases studies in this issue of Tobacco Control. In the IFSC's own study, the average SFC found in 300 barns in the seven countries studied was a remarkably low 7.8kg/kg, with a range of 2.5-40kg/kg among the farms. Factors including the moisture content of the wood, the quantity of wood packed into barns, and the varying constructions of barns were suggested as responsible for these differences. After extrapolating to 69 developing countries that grow tobacco, the IFSC's main conclusions included:
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