Final answer:
Improving environmental conditions can save a significant number of children under the age of 5 in low-income countries.
Step-by-step explanation:
Improving environmental conditions can potentially save a significant number of children under the age of 5 in low-income countries. According to the World Health Organization (WHO), approximately half of the consequences of malnutrition are caused by inadequate water and sanitation provision and poor hygienic practices. Acute respiratory infections from indoor air pollution, diarrheal diseases from poor water and sanitation, and infectious diseases such as malaria are the top killers of children under five. By providing access to clean drinking water, proper sanitation facilities, and addressing indoor air pollution, the number of children saved could be significantly increased.