IELTS JOURNAL 63 treat their land in environmentally friendlier ways, or to leave it fallow. It may sound
strange but such payments need to be higher than the existing incentives for farmers to
grow food crops. Farmers, however, dislike being paid to do nothing. In several countries
they have become interested in the possibility of using fuel produced from crop residues
either as a replacement for petrol (as ethanol) or as fuel for power stations (as biomass).
Such fuels produce far less carbon dioxide than coal or oil, and absorb carbon dioxide as
they grow. They are therefore less likely to contribute to the greenhouse effect. But they
are rarely competitive with fossil fuels unless subsidised - and growing them does no less
environmental harm than other crops.
Section E In poor countries, governments aggravate other sorts of damage. Subsidies for pesticides
and artificial fertilisers encourage farmers to use greater quantities than are needed to
get the highest economic crop yield. A study by the International Rice Research Institute
of pesticide use by farmers in South East Asia found that, with pest-resistant varieties of
rice, even moderate applications of pesticide frequently cost farmers more than they
saved. Such waste puts farmers on a chemical treadmill: bugs and weeds become
resistant to poisons, so next year's poisons must be more lethal. One cost is to human
health. Every year some 10,000 people die from pesticide poisoning, almost all of them in
the developing countries, and another 400,000 become seriously ill. As for artificial
fertilisers, their use world-wide increased by 40 per cent per unit of farmed land between
the mid 1970s and late 1980s, mostly in the developing countries. Overuse of fertilisers
may cause farmers to stop rotating crops or leaving their land fallow. That, in turn, may
make soil erosion worse.