(46) Women make up 40 percent of the world"s work force in agriculture, a quarter in industry, and a third in services. Women farmers in the developing countries grow at least 50 percent of the world"s food, as much as 80 percent in some African countries. (47) In addition to income and generating activities (in cash and kind), women"s household activities include caring for the sick, house maintenance, and such vital work as caring for children, preparing food, and fetching firewood and water. Yet women"s productivity remains low. A woman works both in income-generating work and in home production. Improving women"s productivity can contribute to growth, efficiency, and poverty reduction? A key development goals everywhere. (48) Investing in women—in education, health, family planning—is thus an important part of development strategy as well as a matter of social justice. It is an integral part of the World Bank"s overall strategy for poverty reduction that calls for broadly based, labor-absorbing economic growth and improved human resource development. (49) If long-term change in the conditions of women is to be achieved, the actions and attitudes of men must change and it is important that men be brought along in the process of change. For example, family planning information campaigns should be aimed at men as well as women because it is when men and women are able to make joint informed decisions on family size, child spacing, and appropriate methods of contraception, that these programs are most successful. Likewise, problems affecting women are often close-related to the social relationships between men and women. (50) For example, many women"s health problems are embedded in unequal gender relation in work loads, responsibilities for family welfare, and access to resources and decision-making; it is impossible to deal effectively with women"s health problems through approaches that deal only with women.